美规螺丝常见规格与标示-分类：* 点击： 5786 相关：美规螺丝常见规格与标示美规螺丝a.一般以番号标示, 如 #2-56, #4-40, #6-32, #8-32, #10-24etc. b.或以英制外径表示, 如 0.086-56, 0.112-40 , 0.138-32 , 0.164-32 , 0.190-24etc. Ex: 632 8 P P B: Finish Code: 外观处理规格 Head Code: 头部外型 Drive Code: 头部剖沟,特征型号 Length Code: 螺丝长度 Thread Code: 螺丝型号 B-1: Thread Code: 螺丝型号 一般常用规格如下: a. #2-56 (0.086-56): 2 番 56 牙 b #4-40 (0.112-40) : 4 番 40 牙 c. #6-32 (0.138-32) : 6 番 32 牙 d. #8-32 (0.164-32) : 8 番 32 牙 e. #10-24 (0.190-24): 10 番 24 牙 *牙为每吋之牙数.* B-2: Length Code: 螺丝长度 美规螺丝长度须经换算, 才是公制 mm 尺寸. 换算公式: (Length Code / 32) x 25.40 = 公制长度 mm B-3, B-4,B-5 : 标示方式与公制相同. Number Cap ScrewsScrew Head Counterbore Clearance DrillsScrew SizeDecimalEquiv.Hex Key Diam. (in)Height (in)Diam. (in)Depth (in)CountersinkDiam, 60 (in) Norm. FitClose FitNo. 0 0.060 0.050 0.096 0.060 1/8 0.060 0.074 #49 #51No. 1 0.073 1/16 0.118 0.073 5/32 0.073 0.087 #43 #46No. 2 0.086 5/64 0.140 0.086 3/16 0.086 0.102 #36 3/32No. 3 0.099 5/64 0.161 0.099 7/32 0.099 0.115 #31 #36No. 4 0.112 3/32 0.183 0.112 7/32 0.112 0.130 #29 1/8No. 5 0.125 3/32 0.205 0.125 1/4 0.125 0.145 #23 9/64No. 6 0.138 7/64 0.226 0.138 9/32 0.138 0.158 #18 #23No. 8 0.164 9/64 0.270 0.164 5/16 0.164 0.188 #10 #15No. 10 0.190 5/32 0.312 0.190 3/8 0.190 0.218 #2 #5No. 12 0.216 5/32 0.345 0.216 13/32 0.216 1/4 15/64Fractional Cap ScrewsScrew Head Counterbore Clearance DrillsScrew SizeDecimalEquiv.Hex KeyDiam. (in)Height (in)Diam. (in)Depth (in)CountersinkDiam, 60 (in)Norm. FitClose Fit1/4 0.250 3/16 0.375 0.250 7/16 0.250 0.278 9/32 17/645/16 0.313 1/4 0.469 0.313 17/32 0.313 0.346 11/32 21/643/8 0.375 5/16 0.563 0.375 5/8 0.375 0.415 13/32 25/647/16 0.438 3/8 0.656 0.438 23/32 0.438 0.483 15/32 29/641/2 0.500 3/8 0.750 0.500 13/16 0.500 0.552 17/32 33/649/16 0.563 7/16 0.844 0.563 29/32 0.563 39/64 37/645/8 0.625 1/2 0.938 0.625 1 0.625 0.689 21/32 41/643/4 0.750 5/8 1.125 0.750 1-3/16 0.750 0.828 25/32 49/647/8 0.875 3/4 1.313 0.875 1-3/8 0.875 0.963 29/32 57/641 1.000 3/4 1.500 1.000 1-5/8 1.000 1.100 1-1/32 1-1/641-1/8 1.125 7/81.688 1.1251-13/161.125 1-11/64 #261-1/4 1.250 7/81.875 1.250 21.250 1.370 1-5/16 1-9/321-1/2 1.500 12.250 1.500 2-3/81.500 1.640 1-9/161-17/321-3/4 1.7501-1/42.625 1.750 2-3/41.750 1.9101-13/161-25/322 2.000 1-1/2 3.000 2.000 3-1/8 2.000 2.180 2-1/16 2-1/32Metric Cap ScrewsScrew SizeDecimalEquiv.Hex Key Screw Head CounterboreCountersinkDiam, 60 Clearance DrillsDiam. (mm)Height (mm)Diam. (mm)Depth (mm) (mm)Norm. FitClose FitM1.6 0.062 1.5 3.0 1.6 3.50 1.6 2.0 1.95 1.80M2 0.078 1.5 3.8 2.0 4.40 2.0 2.6 2.40 2.20M2.5 0.098 2 4.5 2.5 5.40 2.5 3.1 3.00 2.70M2.6 0.102 2 5.0 2.6 6.00 2.6 3.20 3.00M3 0.118 2.5 5.5 3.0 6.50 3.0 3.6 3.70 3.40M4 0.157 3 7.0 4.0 8.25 4.0 4.7 4.80 4.40M5 0.196 4 8.5 5.0 9.75 5.0 5.7 5.80 5.40M6 0.236 5 10.0 6.0 11.20 6.0 6.8 6.80 6.40M8 0.315 6 13.0 8.0 14.50 8.0 9.2 8.80 8.40M10 0.393 8 16.0 10.0 17.50 10.0 11.2 10.80 10.50M12 0.472 10 18.0 12.0 19.50 12.0 14.2 13.00 12.50M14 0.551 12 21.0 14.0 22.50 14.0 16.2 15.00 14.50M16 0.629 14 24.0 16.0 25.50 16.0 18.2 17.00 16.50M18 0.708 14 27.0 18.0 28.50 18.0 19.00 18.50M20 0.787 17 30.0 20.0 31.50 20.0 22.4 21.00 20.50M24 0.944 19 36.0 24.0 37.50 24.0 26.4 25.00 24.50M30 1.181 22 45.0 30.0 47.50 30.0 33.4 31.50 31.00M36 1.417 27 54.0 36.0 56.50 36.0 39.4 37.50 37.00M42 1.653 63.0 42.0 66.00 42.0 45.6 44.00 43.00M48 1.889 72.0 48.0 75.00 48.0 52.6 50.00 49.00