美规螺丝常见规格与标示.docx

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 SizeDecimalEquiv.Hex KeyScrew HeadCounterboreCountersinkDiam, 60 (in)Clearance DrillsDiam. (in)Height (in)Diam. (in)Depth (in)Norm. FitClose FitNo. 00.0600.0500.0960.0601/80.0600.074#49#51No. 10.0731/160.1180.0735/320.0730.087#43#46No. 20.0865/640.1400.0863/160.0860.102#363/32No. 30.0995/640.1610.0997/320.0990.115#31#36No. 40.1123/320.1830.1127/320.1120.130#291/8No. 50.1253/320.2050.1251/40.1250.145#239/64No. 60.1387/640.2260.1389/320.1380.158#18#23No. 80.1649/640.2700.1645/160.1640.188#10#15No. 100.1905/320.3120.1903/80.1900.218#2#5No. 120.2165/320.3450.21613/320.2161/415/64Fractional Cap ScrewsScrew SizeDecimalEquiv.Hex KeyScrew HeadCounterboreCountersinkDiam, 60 (in)Clearance DrillsDiam. (in)Height (in)Diam. (in)Depth (in)Norm. FitClose Fit1/40.2503/160.3750.2507/160.2500.2789/3217/645/160.3131/40.4690.31317/320.3130.34611/3221/643/80.3755/160.5630.3755/80.3750.41513/3225/647/160.4383/80.6560.43823/320.4380.48315/3229/641/20.5003/80.7500.50013/160.5000.55217/3233/649/160.5637/160.8440.56329/320.56339/6437/645/80.6251/20.9380.62510.6250.68921/3241/643/40.7505/81.1250.7501-3/160.7500.82825/3249/647/80.8753/41.3130.8751-3/80.8750.96329/3257/6411.0003/41.5001.0001-5/81.0001.1001-1/321-1/641-1/81.1257/81.6881.1251-13/161.1251-11/64#261-1/41.2507/81.8751.25021.2501.3701-5/161-9/321-1/21.50012.2501.5002-3/81.5001.6401-9/161-17/321-3/41.7501-1/42.6251.7502-3/41.7501.9101-13/161-25/3222.0001-1/23.0002.0003-1/82.0002.1802-1/162-1/32Metric Cap ScrewsScrew SizeDecimalEquiv.Hex KeyScrew HeadCounterboreCountersinkDiam, 60 (mm)Clearance DrillsDiam. (mm)Height (mm)Diam. (mm)Depth (mm)Norm. FitClose FitM1.60.0621.53.01.63.501.62.01.951.80M20.0781.53.82.04.402.02.62.402.20M2.50.09824.52.55.402.53.13.002.70M2.60.10225.02.66.002.63.203.00M30.1182.55.53.06.503.03.63.703.40M40.15737.04.08.254.04.74.804.40M50.196 48.55.09.755.05.75.805.40M60.236510.06.011.206.06.86.806.40M80.315613.08.014.508.09.28.808.40M100.393816.010.017.5010.011.210.8010.50M120.4721018.012.019.5012.014.213.0012.50M140.5511221.014.022.5014.016.215.0014.50M160.6291424.016.025.5016.018.217.0016.50M180.7081427.018.028.5018.019.0018.50M200.7871730.020.031.5020.022.421.0020.50M240.9441936.024.037.5024.026.425.0024.50M301.1812245