螺丝攻牙钻孔径和滚丝径对照表

螺丝攻牙钻孔径和滚丝径对照表M18×1.0 17.00 17.153 16.917M20×2.0 18.00 18.210 17.835M20×1.5 18.50 18.676 18.376M20×1.0 19.00 19.153 18.917M22×2.0 20.00 20.210 19.835M22×1.5 20.50 20.676 20.376M22×1.0 21.00 21.153 20.917M24×2.0 22.00 22.210 21.835M24×1.5 22.50 22.676 22.376M24×1.0 23.00 23.153 22.917M25×2.0 23.00 23.210 22.835M25×1.5 23.50 23.676 23.376M25×1.0 24.00 24.153 23.917M26×1.5 24.50 24.676 24.376M27×2.0 25.00 25.210 24.835M27×1.5 25.50 25.676 25.376M27×1.0 26.00 26.153 25.917M28×2.0 26.00 26.210 25.835M28×1.5 26.50 26.676 26.376M28×1.0 27.00 27.153 26.917M30×3.0 27.00 27.252 26.752M30×2.0 28.00 28.210 27.835M30×1.5 28.50 28.676 28.376M30×1.0 29.00 29.153 28.917M32×2.0 30.00 30.210 29.835M32×1.5 30.50 30.676 30.376M33×3.0 30.00 30.252 29.752M33×2.0 31.00 31.210 30.835M33×1.5 31.50 31.676 31.376M35×1.5 33.50 33.676 33.376M36×3.0 33.00 33.252 32.752M36×2.0 34.00 34.210 33.835M36×1.5 34.50 34.676 34.376螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨公制挤压丝攻钻孔径美制挤压丝攻钻孔径螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨规格精度等级规格（UNC）精度等级G4-G6 G7-G8 G9 G4-G6 G7-G8 G9M1.0×0.25 0.86 0.88 －NO.2-56UNC 1.94 －－M1.1×0.25 0.96 0.98 －NO.3-48 2.23 －－M1.2×0.25 1.06 1.08 －NO.4-40 2.50 －－M1.4×0.3 1.24 1.25 －NO.5-40 2.83 －－M1.6×0.35 1.41 1.43 －NO.6-32 3.07 －－M1.7×0.35 1.51 1.53 －NO.8-32 3.73 3.77 －M1.8×0.35 1.61 1.63 －NO.10-24 4.24 4.3 －M2.0×0.4 1.78 1.80 －NO.12-24 4.90 4.96 －M2.2×0.45 1.95 1.98 －1/4-20 － 5.72 －M2.3×0.4 2.08 2.10 －5/16-18 －7.24 －M2.5×0.45 2.25 2.28 －3/8-16 －8.74 8.81 M2.6×0.45 2.35 2.38 －7/16-14 －10.20 10.30 M3.0×0.5 2.73 2.75 －1/2-13 －11.27 11.82 M3.5×0.6 3.17 3.20 －NO.2-64UNF 1.97 －－M4.0×0.7 3.62 3.65 3.69 NO.3-56 2.27 －－M5.0×0.8 4.56 4.60 4.64 NO.4-48 2.56 －－M6.0×1.0 5.45 5.50 5.55 NO.5-44 2.86 －－M7.0×1.0 6.45 6.50 6.55 NO.6-40 3.16 －－M8.0×1.25 7.31 7.38 7.44 NO.8-36 3.78 －－M10×1.5 9.18 9.25 9.32 NO.10-32 4.39 4.43 －M10×1.25 9.31 9.38 9.44 NO.12-28 4.99 5.04 －M12×1.75 11.04 11.12 11.21 1/4-28 5.85 5.90 －M12×1.25 11.31 11.38 11.44 5/16-24 7.36 7.41 －3/8-24 －9.00 －7/16-20 －10.48 10.541/2-20 －12.07 12.13美制特细螺纹英制电器螺纹螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨规格标准径2级牙钻孔径规格钻孔径螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541551821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨最大最小螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨NO.12-32 4.70 4.826 4.623 2BA 4.0-4.2 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541515821425M11×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨1/4 -32 5.60 5.690 5.486 3BA 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541515821425M1.1×025*******州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨5/16 -32 7.10 7.264 7.087 4BA 3.0-3.2 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O164185415515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨3/8 -32 8.70 8.865 8.661 5BA 2.7-2.8 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541515821425M11×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨7/16 -28 10.20 10.338 10.135 6BA 2.4-2.5 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨1/2 -28 11.80 11.938 11.709 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O164185415515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨9/16 -24 13.20 13.386 13.132 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541515821425M1.1×025*******州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨5/8 -24 14.80 14.986 14.732 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O164185415515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨3/4 -20 17.80 17.958 17.678 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O164185415515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨7/8 -20 21.00 21.133 20.853 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O164185415515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨1 -20 24.00 24.308 24.028 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O164185415515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨英制螺纹公制螺纹针车用螺纹螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨规格(UNEF) 钻孔径规格滚丝径规格滚丝径螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541551821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨硬材软材螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 1/8 - 40 2.65 2.60 M3×0.5 2.63-2.60 SM1/8-40 2.735-2.688 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541551821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 5/32 - 32 3.25 3.20 M3.0×0.6 2.56-2.53 SM1/8-44 2.769-2.722 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541515821425M11×025*******州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 3/16 - 24 3.75 3.70 M3.5×0.6 3.06-3.03 SM9/64-40 3.128-3.083 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541551821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 1/4 - 20 5.10 5.00 M4.0×0.7 3.49-3.45 SM11/64-40 3.855-3.805 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 5/16 - 18 6.60 6.50 M4.0×0.75 3.45-3.41 SM3/16-32 4.205-4.155 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541551821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 3/8 - 16 8.00 7.90 M4.5×0.75 3.96-3.92 SM3/16-28 4.143-4.093 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 7/16 - 14 9.40 9.30 M5.0×0.8 4.43-4.38 SM7/32-32 5.003-4.955 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×2507507850729N O16418541515821425M1×025085085州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 1/2 - 12 10.70 10.50 M5.0×0.9 4.36-4.31 SM15/64-28 5.325-5.570 螺丝攻牙钻孔径和滚丝径对照表螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格（U N C）标准径2级牙钻孔径最大最小最大最小M10×02507507850729N O16418541515821425M11×025*******州涕然损句革先偷蔗鹿瞪纹嫡炽颧牙沉滤备取勃玩言搁网钦牢耙泳搔服讣殷褪趾夺程袱蹋谱揪肘录在靳清仍效疑寅需形熙铭稽旭桅腆币凶之储耸惨W 9/16 - 12 12.30 12.00 M6.0×1.0 5.30-5.25 SM1/4-40 5.890-5.735 00000000W 5/8 - 11 13.70 13.50 M7.0×1.0 6.30-6.25 SM1/4-28 5.721-5.366 0000000W 3/4 - 10 16.70 16.50 M8.0×1.0 7.28-7.23 SM9/32-28 6.508-6.648 00000000W 7/8 - 9 19.50 19.30 M8.0×1.25 7.12-7.07 SM11/32-28 8.092-8.432 00000000W1 - 8 22.40 22.00 SM3/8-28 8.880-8.015 00000000W 1-1/8 - 7 25.00 24.80 SM7/16-28 10.466-10.401 00000000W 1 - 1/4 - 7 28.30 28.00 SM7/16-16 10.037-9.967 00000000SM1/2-20 11.819-11.749 0000000SM9/26-20 13.400-13.425 00000000英制管螺纹英制管螺纹美制管螺纹0000000规格标准径钻孔径规格标准径有交牙部之长度（最小）中之毋螺牙内径标准长度（最小）中之毋螺牙内径规格钻孔径0000000最大最小使用绞刀时不用绞刀时NPT NPS 00000000使用绞刀时不用绞刀时0000000PS 1/16 - 28 6.50 6.632 6.490 PT 1/16 - 28 6.10 6.20 6.244 6.384 1/16 - 27 6.10 6.25 6.35 00000000PS 1/8 - 28 8.50 8.637 8.495 PT 1/8 - 28 8.10 8.20 8.249 8.388 1/8 - 27 8.33 8.43 8.74 00000000PS 1/4 - 19 11.40 11.549 11.341 PT 1/4 - 19 10.70 11.00 10.962 11.174 1/4 - 18 10.72 11.13 11.13 00000000PS 3/8 - 19 15.00 15.054 14.846 PT 3/8 - 19 14.20 14.50 14.448 14.658 3/8 - 18 14.27 14.27 14.68 00000000PS 1/2 - 14 18.50 18.773 18.489 PT 1/2 - 14 17.60 18.00 17.979 18.263 1/2 - 14 17.48 17.86 18.26 00000000PS 3/4 -14 24.00 24.259 23.975 PT 3/4 - 14 23.00 23.50 23.378 23.663 3/4 - 14 22.63 23.01 23.42 0000000PS 1 - 11 30.20 30.471 30.111 PT 1- 11 29.00 29.50 29.459 29.822 1 - 11-1/2 28.58 28.98 29.36 00000000PS 1-1/4 - 11 38.80 39.132 38.772 PT 1-1/4 - 11 37.50 38.00 37.976 38.339 1-1/4-11-1/2 37.31 37.69 38.10 00000000 PS 1-1/2 - 11 44.80 45.025 44.665 PT 1-1/2 - 11 43.40 44.00 43.869 44.232 1-1/2-11-1/2 43.66 44.04 44.45 00000000。

螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径 2级牙钻孔径规格〔UNC〕标准径 2级牙钻孔径最大最小最大最小M1.0×0.25 0.75 0.785 0.729 NO.1-64(1.854) 1.55 1.582 1.425 M1.1×0.25 0.85 0.885 0.829 NO.2-56(2.184) 1.80 1.871 1.695 M1.2×0.25 0.95 0.9850.985 NO.3-48(2.515) 2.10 2.146 1.941M1.4×0.3 1.10 1.142 1.075 NO.4-40(2.845) 2.30 2.385 2.157 M1.6×0.35 1.25 1.321 1.221 NO.5-40(3.175) 2.60 2.697 2.487 M1.7×0.35 1.35 1.421 1.321 NO.6-32(3.505) 2.80 2.895 2.642 M1.8×0.35 1.45 1.521 1.421 NO8-32(4.166) 3.40 3.53 3.302M2.0×0.4 1.60 1.679 1.567 NO.10-24(4.826) 3.90 3.962 3.683 M2.2×0.45 1.75 1.838 1.713 NO.12-24(5.486) 4.50 4.597 4.344 M2.3×0.4 1.90 1.979 1.867 1/4-20 5.10 5.257 4.979M2.5×0.45 2.10 2.138 2.013 5/16-18 6.60 6.731 6.401M2.6×0.45 2.20 2.238 2.113 3/8-16 8.00 8.153 7.798M3.0×0.5 2.50 2.599 2.459 7/16-14 9.40 9.55 9.144M3.0×0.6 2.40 2.440 2.280 1/2-13 10.80 11.023 10.592M3.5×0.6 2.90 3.010 2.850 9/16-12 12.20 12.446 11.989M4.0×0.7 3.30 3.422 3.242 5/8-11 13.60 12.868 13.386M4.0×0.75 3.25 3.326 3.106 3/4-10 16.50 18.840 16.307M4.5×0.75 3.80 3.878 3.688 7/8-9 19.50 19.761 19.177M5.0×0.8 4.20 4.334 4.134 1 22.20 22.606 21.971M5.0×0.9 4.10 4.170 3.930 1-1/8-7 25.00 25.349 24.638M6.0×1.0 5.00 5.153 4.917 1-1/4-7 28.20 28.524 27.813M7.0×1.0 6.00 6.153 5.917 1-3/8-6 30.80 31.115 30.353M8.0×1.25 6.80 6.912 6.647 1-1/2-6 34.00 34.290 33.528M9.0×1.25 7.80 7.912 7.647 1-3/4-5 39.50 39.827 38.964M10×1.5 8.50 8.676 8.376 2-4-1/2 45.20 45.593 44.679M11×1.5 9.50 9.676 9.376M12×1.75 10.30 10.441 10.106M14×2.0 12.00 12.210 11.835M16×2.0 14.00 14.210 13.835M18×2.5 15.50 15.744 15.294M20×2.5 17.50 17.744 17.294M22×2.5 19.50 19.744 19.294M24×3.0 21.00 21.252 20.752M27×3.0 24.00 24.252 23.752M30×3.5 26.50 26.771 26.211螺丝攻牙钻孔径和滚丝径对照表公制细螺纹美制细螺纹规格标准径 2级牙钻孔径规格〔UNC〕标准径 2级牙钻孔径最大最小最大最小M1.0×0.2 0.80 0.821 0.783 NO.0-80(1.524) 1.25 1.305 1.182M1.1×0.2 0.90 0.921 0.883 NO.1-72(1.854) 1.55 1.612 1.474M1.2×0.2 1.00 1.021 0.983 NO.2-64(2.184) 1.85 1.912 1.756M1.4×0.2 1.20 1.221 1.183 NO.3-56(2.515) 2.10 2.197 2.025M1.6×0.2 1.40 1.421 1.383 NO.4-48(2.845) 2.40 2.458 2.271M1.7×0.2 1.45 1.500 1.460 NO.5-44(3.175) 2.70 2.740 2.551M1.8×0.2 1.60 1.621 1.583 NO.6-40(3.505) 2.90 3.022 2.820 M2.0×0.25 1.75 1.785 1.729 NO.8-36(4.166) 3.50 3.606 3.404 M2.2×0.25 1.95 1.985 1.929 NO.10-32(4.826) 4.10 4.165 3.963 M2.3×0.25 2.05 2.061 2.001 NO.12-28(5.846) 4.60 4.724 4.496 M2.5×0.35 2.20 2.221 2.121 1/4-28 5.50 5.588 5.360M2.6×0.35 2.20 2.246 2.186 5/16-24 6.90 7.035 6.782M3.0×0.35 2.70 2.721 2.621 3/8-24 8.50 8.636 8.382M3.5×0.35 3.20 3.221 3.121 7/16-20 9.90 10.033 9.729M4.0×0.5 3.50 3.599 3.459 1/2-20 11.50 11.607 11.329M4.5×0.5 4.00 4.099 3.959 9/16-18 12.90 13.081 12.751M5.0×0.5 4.50 4.599 4.459 5/8-18 14.50 14.681 14.351M5.5×0.5 5.00 5.099 4.959 3/4-16 17.50 17.678 17.323M6.0×0.75 5.30 5.378 5.188 7/8-14 20.50 20.675 20.270M6.0×0.5 5.50 5.550 5.400 1-12 23.20 23.571 23.114M7.0×0.75 6.30 6.378 6.188 1-1/8-12 26.50 26.746 26.289M7.0×0.5 6.50 6.550 6.400 1-1/4-12 29.50 29.921 29.464M8.0×1.0 7.00 7.153 6.917 1-3/8-12 32.80 33.096 32.639M8.0×0.75 7.30 7.378 7.188 1-1/2-12 36.00 36.271 35.814M8.0×0.5 7.50 7.520 7.400M9.0×1.0 8.00 8.153 7.917M9.0×0.75 8.30 8.378 8.188M10×1.25 8.80 8.912 8.647M10×1.0 9.00 9.153 8.917M10×0.75 9.30 9.378 9.188M10×0.5 9.50 9.520 9.400M11×1.0 10.00 10.153 9.917M11×0.75 10.30 10.378 10.188. .M12×1.5 10.50 10.676 10.376M12×1.25 10.80 10.912 10.647M12×1.0 11.00 11.153 10.917M12×0.5 11.50 11.520 11.400M14×1.5 12.50 12.676 12.376M14×1.0 13.00 13.153 12.917M15×1.5 13.50 13.676 13.376M15×1.0 14.00 14.153 13.917M16×1.5 14.50 14.676 14.376M16×1.0 15.00 15.153 14.917M17×1.5 15.50 15.676 15.376M17×1.0 16.00 16.153 15.917M18×2.0 16.00 16.210 15.835M18×1.5 16.50 16.676 16.376M18×1.0 17.00 17.153 16.917M20×2.0 18.00 18.210 17.835M20×1.5 18.50 18.676 18.376M20×1.0 19.00 19.153 18.917M22×2.0 20.00 20.210 19.835M22×1.5 20.50 20.676 20.376M22×1.0 21.00 21.153 20.917M24×2.0 22.00 22.210 21.835M24×1.5 22.50 22.676 22.376M24×1.0 23.00 23.153 22.917M25×2.0 23.00 23.210 22.835M25×1.5 23.50 23.676 23.376M25×1.0 24.00 24.153 23.917M26×1.5 24.50 24.676 24.376M27×2.0 25.00 25.210 24.835M27×1.5 25.50 25.676 25.376M27×1.0 26.00 26.153 25.917M28×2.0 26.00 26.210 25.835M28×1.5 26.50 26.676 26.376M28×1.0 27.00 27.153 26.917M30×3.0 27.00 27.252 26.752M30×2.0 28.00 28.210 27.835M30×1.5 28.50 28.676 28.376M30×1.0 29.00 29.153 28.917. v .M32×2.0 30.00 30.210 29.835M32×1.5 30.50 30.676 30.376M33×3.0 30.00 30.252 29.752M33×2.0 31.00 31.210 30.835M33×1.5 31.50 31.676 31.376M35×1.5 33.50 33.676 33.376M36×3.0 33.00 33.252 32.752M36×2.0 34.00 34.210 33.835M36×1.5 34.50 34.676 34.376螺丝攻牙钻孔径和滚丝径对照表公制挤压丝攻钻孔径美制挤压丝攻钻孔径规格精度等级规格〔UNC〕精度等级G4-G6 G7-G8 G9 G4-G6 G7-G8 G9M1.0×0.25 0.86 0.88 － NO.2-56UNC 1.94 －－M1.1×0.25 0.96 0.98 － NO.3-48 2.23 －－M1.2×0.25 1.06 1.08 － NO.4-40 2.50 －－M1.4×0.3 1.24 1.25 － NO.5-40 2.83 －－M1.6×0.35 1.41 1.43 － NO.6-32 3.07 －－M1.7×0.35 1.51 1.53 － NO.8-32 3.73 3.77 －M1.8×0.35 1.61 1.63 － NO.10-24 4.24 4.3 －M2.0×0.4 1.78 1.80 － NO.12-24 4.90 4.96 －M2.2×0.45 1.95 1.98 － 1/4-20 － 5.72 －M2.3×0.4 2.08 2.10 － 5/16-18 － 7.24 －M2.5×0.45 2.25 2.28 － 3/8-16 － 8.74 8.81M2.6×0.45 2.35 2.38 － 7/16-14 － 10.20 10.30 M3.0×0.5 2.73 2.75 － 1/2-13 － 11.27 11.82M3.5×0.6 3.17 3.20 － NO.2-64UNF 1.97 －－M4.0×0.7 3.62 3.65 3.69 NO.3-56 2.27 －－M5.0×0.8 4.56 4.60 4.64 NO.4-48 2.56 －－M6.0×1.0 5.45 5.50 5.55 NO.5-44 2.86 －－M7.0×1.0 6.45 6.50 6.55 NO.6-40 3.16 －－M8.0×1.25 7.31 7.38 7.44 NO.8-36 3.78 －－M10×1.5 9.18 9.25 9.32 NO.10-32 4.39 4.43 －M10×1.25 9.31 9.38 9.44 NO.12-28 4.99 5.04 －M12×1.75 11.04 11.12 11.21 1/4-28 5.85 5.90 －M12×1.25 11.31 11.38 11.44 5/16-24 7.36 7.41 － 3/8-24 － 9.00 －. .7/16-20 － 10.48 10.541/2-20 － 12.07 12.13美制特细螺纹英制电器螺纹规格标准径 2级牙钻孔径规格钻孔径最大最小NO.12-32 4.70 4.826 4.623 2BA 4.0-4.21/4 -32 5.60 5.690 5.486 3BA5/16 -32 7.10 7.264 7.087 4BA 3.0-3.23/8 -32 8.70 8.865 8.661 5BA 2.7-2.87/16 -28 10.20 10.338 10.135 6BA 2.4-2.51/2 -28 11.80 11.938 11.7099/16 -24 13.20 13.386 13.1325/8 -24 14.80 14.986 14.7323/4 -20 17.80 17.958 17.6787/8 -20 21.00 21.133 20.8531 -20 24.00 24.308 24.028螺丝攻牙钻孔径和滚丝径对照表英制螺纹公制螺纹针车用螺纹规格(UNEF) 钻孔径规格滚丝径规格滚丝径硬材软材W 1/8 - 40 2.65 2.60 M3×0.5 2.63-2.60 SM1/8-40 2.735-2.688W 5/32 - 32 3.25 3.20 M3.0×0.6 2.56-2.53 SM1/8-44 2.769-2.722W 3/16 - 24 3.75 3.70 M3.5×0.6 3.06-3.03 SM9/64-40 3.128-3.083 W 1/4 - 20 5.10 5.00 M4.0×0.7 3.49-3.45 SM11/64-40 3.855-3.805 W 5/16 - 18 6.60 6.50 M4.0×0.75 3.45-3.41 SM3/16-32 4.205-4.155 W 3/8 - 16 8.00 7.90 M4.5×0.75 3.96-3.92 SM3/16-28 4.143-4.093 W 7/16 - 14 9.40 9.30 M5.0×0.8 4.43-4.38 SM7/32-32 5.003-4.955 W 1/2 - 12 10.70 10.50 M5.0×0.9 4.36-4.31 SM15/64-28 5.325-5.570 W 9/16 - 12 12.30 12.00 M6.0×1.0 5.30-5.25 SM1/4-40 5.890-5.735 W 5/8 - 11 13.70 13.50 M7.0×1.0 6.30-6.25 SM1/4-28 5.721-5.366 W 3/4 - 10 16.70 16.50 M8.0×1.0 7.28-7.23 SM9/32-28 6.508-6.648 W 7/8 - 9 19.50 19.30 M8.0×1.25 7.12-7.07 SM11/32-28 8.092-8.432 W1 - 8 22.40 22.00 SM3/8-28 8.880-8.015W 1-1/8 - 7 25.00 24.80 SM7/16-28 10.466-10.401W 1 - 1/4 - 7 28.30 28.00 SM7/16-16 10.037-9.967SM1/2-20 11.819-11.749. v .SM9/26-20 13.400-13.425英制管螺纹英制管螺纹美制管螺纹规格标准径钻孔径规格标准径有交牙部之长度〔最小〕中之毋螺牙内径标准长度〔最小〕中之毋螺牙内径规格钻孔径最大最小使用绞刀时不用绞刀时 NPT NPS使用绞刀时不用绞刀时PS 1/16 - 28 6.50 6.632 6.490 PT 1/16 - 28 6.10 6.20 6.244 6.384 1/16 - 27 6.10 6.25 6.35PS 1/8 - 28 8.50 8.637 8.495 PT 1/8 - 28 8.10 8.20 8.249 8.388 1/8 - 278.33 8.43 8.74PS 1/4 - 19 11.40 11.549 11.341 PT 1/4 - 19 10.70 11.00 10.962 11.174 1/4 - 18 10.72 11.13 11.13PS 3/8 - 19 15.00 15.054 14.846 PT 3/8 - 19 14.20 14.50 14.448 14.658 3/8 - 18 14.27 14.27 14.68PS 1/2 - 14 18.50 18.773 18.489 PT 1/2 - 14 17.60 18.00 17.979 18.263 1/2 - 14 17.48 17.86 18.26PS 3/4 -14 24.00 24.259 23.975 PT 3/4 - 14 23.00 23.50 23.378 23.663 3/4 - 14 22.63 23.01 23.42PS 1 - 11 30.20 30.471 30.111 PT 1- 11 29.00 29.50 29.459 29.822 1 - 11-1/2 28.58 28.98 29.36PS 1-1/4 - 11 38.80 39.132 38.772 PT 1-1/4 - 11 37.50 38.00 37.976 38.339 1-1/4-11-1/2 37.31 37.69 38.10PS 1-1/2 - 11 44.80 45.025 44.665 PT 1-1/2 - 11 43.40 44.00 43.869 44.232 1-1/2-11-1/2 43.66 44.04 44.45PS 2 - 11 56.50 56.836 56.476 PT 2 - 11 54.90 55.50 55.412 55.844 2 - 11 - 1/2 55.58 55.96 56.36。

螺丝攻牙钻孔径和滚丝径对照表公制粗螺纹美制粗螺纹规格标准径2 级牙钻孔径 最大 最小规格（UNC）标准径2 级牙钻孔径 最大 最小M1.0×0.25 0.75 0.785 0.729 NO.1-64(1.854)1.55 1.582 1.425M1.1×0.25 0.85 0.885 0.829 NO.2-56(2.184)1.80 1.871 1.695M1.2×0.25 0.95 0.985 0.985 NO.3-48(2.515)2.10 2.146 1.941M1.4×0.3 1.10 1.142 1.075 NO.4-40(2.845)2.30 2.385 2.157M1.6×0.35 1.25 1.321 1.221 NO.5-40(3.175)2.60 2.697 2.487M1.7×0.35 1.35 1.421 1.321 NO.6-32(3.505)2.80 2.895 2.642M1.8×0.35 1.45 1.521 1.421 NO8-32(4.166)3.40 3.53 3.302M2.0×0.4 1.60 1.679 1.567 NO.10-24(4.826)3.90 3.962 3.683M2.2×0.45 1.75 1.838 1.713 NO.12-24(5.486)4.50 4.597 4.344M2.3×0.4 1.90 1.979 1.867 1/4-205.10 5.257 4.979M2.5×0.45 2.10 2.138 2.013 5/16-186.60 6.731 6.401M2.6×0.45 2.20 2.238 2.113 3/8-168.00 8.153 7.798M3.0×0.5 2.50 2.599 2.459 7/16-149.40 9.55 9.144M3.0×0.6 2.40 2.440 2.280 1/2-1310.80 11.023 10.592M3.5×0.6 2.90 3.010 2.850 9/16-1212.20 12.446 11.989M4.0×0.7 3.30 3.422 3.242 5/8-1113.60 12.868 13.386M4.0×0.75 3.25 3.326 3.106 3/4-1016.50 18.840 16.3071M4.5×0.75 3.80 M5.0×0.8 4.20 M5.0×0.9 4.10 M6.0×1.0 5.00 M7.0×1.0 6.00 M8.0×1.25 6.80 M9.0×1.25 7.80 M10×1.5 8.50 M11×1.5 9.50 M12×1.75 10.30 M14×2.0 12.00 M16×2.0 14.00 M18×2.5 15.50 M20×2.5 17.50 M22×2.5 19.50 M24×3.0 21.00 M27×3.0 24.00 M30×3.5 26.50签名档：3.878 3.688 7/8-9 4.334 4.134 1 4.170 3.930 1-1/8-7 5.153 4.917 1-1/4-7 6.153 5.917 1-3/8-6 6.912 6.647 1-1/2-6 7.912 7.647 1-3/4-5 8.676 8.376 2-4-1/2 9.676 9.376 10.441 10.106 12.210 11.835 14.210 13.835 15.744 15.294 17.744 17.294 19.744 19.294 21.252 20.752 24.252 23.752 26.771 26.21119.50 22.20 25.00 28.20 30.80 34.00 39.50 45.2019.761 19.177 22.606 21.971 25.349 24.638 28.524 27.813 31.115 30.353 34.290 33.528 39.827 38.964 45.593 44.6792螺丝攻牙钻孔径和滚丝径对照表公制细螺纹美制细螺纹规格标准径2 级牙钻孔径 最大 最小规格（UNC）标准径2 级牙钻孔径 最大 最小M1.0×0.2 0.80 0.821 0.783 NO.0-80(1.524)1.25 1.305 1.182M1.1×0.2 0.90 0.921 0.883 NO.1-72(1.854)1.55 1.612 1.474M1.2×0.2 1.00 1.021 0.983 NO.2-64(2.184)1.85 1.912 1.756M1.4×0.2 1.20 1.221 1.183 NO.3-56(2.515)2.10 2.197 2.025M1.6×0.2 1.40 1.421 1.383 NO.4-48(2.845)2.40 2.458 2.271M1.7×0.2 1.45 1.500 1.460 NO.5-44(3.175)2.70 2.740 2.551M1.8×0.2 1.60 1.621 1.583 NO.6-40(3.505)2.90 3.022 2.820M2.0×0.25 1.75 1.785 1.729 NO.8-36(4.166)3.50 3.606 3.404M2.2×0.25 1.95 1.985 1.929 NO.10-32(4.826)4.104.165 3.963M2.3×0.25 2.05 2.061 2.001 NO.12-28(5.846)4.604.724 4.496M2.5×0.35 2.20 2.221 2.121 1/4-285.50 5.588 5.360M2.6×0.35 2.20 2.246 2.186 5/16-246.90 7.035 6.782M3.0×0.35 2.70 2.721 2.621 3/8-248.50 8.636 8.382M3.5×0.35 3.20 3.221 3.121 7/16-209.90 10.033 9.729M4.0×0.5 3.50 3.599 3.459 1/2-2011.50 11.607 11.329M4.5×0.5 4.00 4.099 3.959 9/16-1812.90 13.081 12.751M5.0×0.5 4.50 4.599 4.459 5/8-1814.50 14.681 14.3513M5.5×0.5 5.00 M6.0×0.75 5.30 M6.0×0.5 5.50 M7.0×0.75 6.30 M7.0×0.5 6.50 M8.0×1.0 7.00 M8.0×0.75 7.30 M8.0×0.5 7.50 M9.0×1.0 8.00 M9.0×0.75 8.30 M10×1.25 8.80 M10×1.0 9.00 M10×0.75 9.30 M10×0.5 9.505.099 5.378 5.550 6.378 6.550 7.153 7.378 7.520 8.153 8.378 8.912 9.153 9.378 9.5204.959 5.188 5.400 6.188 6.400 6.917 7.188 7.400 7.917 8.188 8.647 8.917 9.188 9.4003/4-16 7/8-14 1-12 1-1/8-12 1-1/4-12 1-3/8-12 1-1/2-1217.50 20.50 23.20 26.50 29.50 32.80 36.0017.678 17.323 20.675 20.270 23.571 23.114 26.746 26.289 29.921 29.464 33.096 32.639 36.271 35.814螺丝攻牙钻孔径和滚丝径对照表规格 M11×1.0公制细螺纹标准径2 级牙钻孔径 最大 最小10.00 10.153 9.917美制细螺纹规格（UNC）标准径2 级牙钻孔径 最大 最小4M11×0.75 M12×1.5 M12×1.25 M12×1.0 M12×0.5 M14×1.5 M14×1.0 M15×1.5 M15×1.0 M16×1.5 M16×1.0 M17×1.5 M17×1.0 M18×2.0 M18×1.5 M18×1.0 M20×2.0 M20×1.5 M20×1.0 M22×2.0 M22×1.510.30 10.50 10.80 11.00 11.50 12.50 13.00 13.50 14.00 14.50 15.00 15.50 16.00 16.00 16.50 17.00 18.00 18.50 19.00 20.00 20.5010.378 10.188 10.676 10.376 10.912 10.647 11.153 10.917 11.520 11.400 12.676 12.376 13.153 12.917 13.676 13.376 14.153 13.917 14.676 14.376 15.153 14.917 15.676 15.376 16.153 15.917 16.210 15.835 16.676 16.376 17.153 16.917 18.210 17.835 18.676 18.376 19.153 18.917 20.210 19.835 20.676 20.3765M22×1.0 M24×2.0 M24×1.5 M24×1.0 M25×2.0 M25×1.5 M25×1.0 M26×1.5 M27×2.0 M27×1.5 M27×1.0 M28×2.0 M28×1.5 M28×1.0 M30×3.0 M30×2.0 M30×1.5 M30×1.0 M32×2.0 M32×1.5 M33×3.021.00 22.00 22.50 23.00 23.00 23.50 24.00 24.50 25.00 25.50 26.00 26.00 26.50 27.00 27.00 28.00 28.50 29.00 30.00 30.50 30.0021.153 20.917 22.210 21.835 22.676 22.376 23.153 22.917 23.210 22.835 23.676 23.376 24.153 23.917 24.676 24.376 25.210 24.835 25.676 25.376 26.153 25.917 26.210 25.835 26.676 26.376 27.153 26.917 27.252 26.752 28.210 27.835 28.676 28.376 29.153 28.917 30.210 29.835 30.676 30.376 30.252 29.7526M33×2.0 M33×1.5 M35×1.5 M36×3.0 M36×2.0 M36×1.5 签名档：31.00 31.50 33.50 33.00 34.00 34.5031.210 30.835 31.676 31.376 33.676 33.376 33.252 32.752 34.210 33.835 34.676 34.376螺丝攻牙钻孔径和滚丝径对照表公制挤压丝攻钻孔径美制挤压丝攻钻孔径规格精度等级 G4-G6 G7-G8 G9规格（UNC）精度等级 G4-G6 G7-G8 G9M1.0×0.25 0.860.88－ NO.2-56UNC1.94－－M1.1×0.25 0.960.98－ NO.3-482.23－－M1.2×0.25 1.061.08－ NO.4-402.50－－M1.4×0.31.241.25－NO.5-402.83－－M1.6×0.35 1.411.43－ NO.6-323.07－－M1.7×0.35 1.511.53－ NO.8-323.733.77－M1.8×0.35 1.611.63－ NO.10-244.244.3－7M2.0×0.4 M2.2×0.45 M2.3×0.4 M2.5×0.45 M2.6×0.45 M3.0×0.5 M3.5×0.6 M4.0×0.7 M5.0×0.8 M6.0×1.0 M7.0×1.0 M8.0×1.25 M10×1.5 M10×1.25 M12×1.75 M12×1.251.78 1.95 2.08 2.25 2.35 2.73 3.17 3.62 4.56 5.45 6.45 7.31 9.18 9.31 11.04 11.311.80 1.98 2.10 2.28 2.38 2.75 3.20 3.65 4.60 5.50 6.50 7.38 9.25 9.38 11.12 11.38－ NO.12-24 － 1/4-20 － 5/16-18 － 3/8-16 － 7/16-14 － 1/2-13 － NO.2-64UNF 3.69 NO.3-56 4.64 NO.4-48 5.55 NO.5-44 6.55 NO.6-40 7.44 NO.8-36 9.32 NO.10-32 9.44 NO.12-28 11.21 1/4-28 11.44 5/16-243/8-24 7/16-20 1/2-204.904.96－－5.72－－7.24－－8.748.81－10.20 10.30－11.27 11.821.97－－2.27－－2.56－－2.86－－3.16－－3.78－－4.394.43－4.995.04－5.855.90－7.367.41－－9.00－－10.48 10.54－12.07 12.13签名档：8规格NO.12-32 1/4 -32 5/16 -32 3/8 -32 7/16 -28 1/2 -28 9/16 -24 5/8 -24 3/4 -20 7/8 -20 1 -20 签名档：美制特细螺纹标准径2 级牙钻孔径最大最小4.704.8264.6235.605.6905.4867.107.2647.0878.708.8658.66110.2010.33810.13511.8011.93811.70913.2013.38613.13214.8014.98614.73217.8017.95817.67821.0021.13320.85324.0024.30824.028英制电器螺纹规格钻孔径2BA4.0-4.23BA4BA3.0-3.25BA2.7-2.86BA2.4-2.59螺丝攻牙钻孔径和滚丝径对照表英制螺纹公制螺纹针车用螺纹规格(UNEF)钻孔径 硬材 软材规格滚丝径规格滚丝径W 1/8 - 402.65 2.60 M3×0.52.63-2.60 SM1/8-402.735-2.688W 5/32 - 323.25 3.20 M3.0×0.6 2.56-2.53 SM1/8-442.769-2.722W 3/16 - 243.75 3.70 M3.5×0.6 3.06-3.03 SM9/64-40 3.128-3.083W 1/4 - 205.10 5.00 M4.0×0.7 3.49-3.45 SM11/64-40 3.855-3.805W 5/16 - 186.60 6.50 M4.0×0.75 3.45-3.41 SM3/16-32 4.205-4.155W 3/8 - 168.00 7.90 M4.5×0.75 3.96-3.92 SM3/16-28 4.143-4.093W 7/16 - 149.40 9.30 M5.0×0.8 4.43-4.38 SM7/32-32 5.003-4.955W 1/2 - 1210.70 10.50 M5.0×0.9 4.36-4.31 SM15/64-28 5.325-5.570W 9/16 - 1212.30 12.00 M6.0×1.0 5.30-5.25 SM1/4-405.890-5.735W 5/8 - 1113.70 13.50 M7.0×1.0 6.30-6.25 SM1/4-285.721-5.366W 3/4 - 1016.70 16.50 M8.0×1.0 7.28-7.23 SM9/32-28 6.508-6.648W 7/8 - 919.50 19.30 M8.0×1.25 7.12-7.07 SM11/32-28 8.092-8.432W1 - 822.40 22.00SM3/8-288.880-8.015W 1-1/8 - 725.00 24.80SM7/16-28 10.466-10.401W 1 - 1/4 - 7 28.30 28.00SM7/16-16 10.037-9.96710SM1/2-20 SM9/26-2011.819-11.749 13.400-13.425签名档：英制管螺纹英制管螺纹美制管螺纹规格钻孔径标准 径 最大 最小规格标准径 有交 标准牙部 长度之长 （最使用 不用 度（最 小）中绞刀 绞刀 小）中 之毋时 时 之毋 螺牙螺牙 内径内径规格钻孔径 NPT使用 不用 NPS绞刀 绞刀 时时PS 1/16 -PT 1/16 -6.50 6.632 6.4906.10 6.20 6.244 6.384 1/16 - 2728286.10 6.25 6.35PS 1/8 -PT 1/8 -8.50 8.637 8.4958.10 8.20 8.249 8.388 1/8 - 2728288.33 8.43 8.7411PS 1/4 -PT 1/4 -11.40 11.54911.34110.70 11.00 10.962 11.174 1/4 - 18191910.7211.13 11.13PS 3/8 -PT 3/8 -15.00 15.05414.84614.20 14.50 14.448 14.658 3/8 - 18191914.2714.27 14.68PS 1/2 -PT 1/2 -18.50 18.77318.48917.60 18.00 17.979 18.263 1/2 - 14141417.4817.86 18.26PS 3/4PT 3/4 -24.00 24.25923.97523.00 23.50 23.378 23.663 3/4 - 14-141422.6323.01 23.42PS 1 - 11 30.20 30.47130.111 PT 1- 11 29.00 29.50 29.459 29.822 1 - 11-1/2 28.5828.98 29.36PS 1-1/4PT 1-1/438.80 39.13238.77237.50 38.00 37.976 38.339 1-1/4-11-1/237.3137.69 38.10- 11- 11PS 1-1/2PT 1-1/244.80 45.02544.66543.40 44.00 43.869 44.232 1-1/2-11-1/243.6644.04 44.45- 11- 11PS 2 - 11 56.50 56.83656.476 PT 2 - 11 54.90 55.50 55.412 55.844 2 - 11 - 1/2 55.5855.96 56.36签名档：12英制螺纹螺母孔径英制螺圆 拄管纹螺纹螺纹直径 （英寸）每英寸 牙数钻头直径螺纹直钻头直（毫米）每英寸径（英径（毫铸铁、黄 钢、可锻牙数寸）米）铜、青铜 铸铁3/16243.83.91/8 288.81/4205.15.21/4 1911.75/16186.66.73/8 1915.23/81688.11/2 1418.91/21210.6 10.7 3/4 1424.45/81113.6 13.8 11130.63/41016.616.811/41139.27/8919.519.713/81141.61822.322.511/21145.111/872525.211/4728.2 28.411/263434.213/4539.5 39.7241/245.3 45.61314。