Hexagon Socket Head Cap Screws BS 2470

ASTM A193 Grade B7 Specifications

Dimensions of hexagon socket head cap screws,ISO inch (Unified) threads

Nominal SizeDAHSJKWFillet radiusCT
Body diameterHead diameterHead heightHead side heightHexagon socket size*Key engagementWall thicknessFdaChamfer or radiusThread length
Max.Min.Max.Min.Max.Min.Min.Nom.Min.Min.Min.Max.Max.Min.
00.06000.05680.0960.0910.0600.0570.0540.0500.0250.0200.0030.0740.0030.500
10.07300.06950.1180.1120.0730.0700.0660.0500.0310.0250.0030.0870.0030.625
20.08600.08220.1400.1340.0860.0830.0771/160.0380.0290.0040.1020.0030.625
30.09900.09490.1610.1540.0990.0950.0895/640.0440.0340.0040.1150.0030.625
40.11200.10750.1830.1760.1120.1080.1015/640.0510.0380.0050.1300.0050.750
50.12500.12020.2050.1980.1250.1210.1123/320.0570.0430.0060.1450.0050.750
60.13800.13290.2260.2180.1380.1340.1243/320.0640.0470.0060.1580.0050.750
80.16400.15850.2700.2620.1640.1590.1481/80.0770.0560.0070.1880.0050.875
100.19000.18400.3120.3030.1900.1850.1715/320.0900.0650.0090.2180.0050.875
1/40.25000.24350.3750.3650.2500.2440.2253/160.1200.0950.0090.2780.0081.000
5/160.31250.30530.4370.4250.3120.3060.2817/320.1510.1190.0120.34650.0081.125
3/80.37500.36780.5620.5500.3750.3680.3375/160.1820.1430.0150.4150.0081.250
7/160.43750.42940.6250.6110.4370.4300.3945/160.2130.1660.0180.48350.0101.375
1/20.50000.49190.7500.7350.5000.4920.4503/80.2450.1900.0200.5520.0101.500
5/80.62500.61630.8750.8580.6250.6160.5621/20.3070.2380.0240.6890.0101.750
3/40.75000.74061.0000.9820.7500.7400.6759/160.3700.2850.0300.8280.0102.000
7/80.87500.86471.1251.1050.8750.8640.7879/160.4320.3330.0340.9630.0152.250
11.00000.98861.3121.2911.0000.9880.9005/80.4950.3800.0401.1000.0152.500

ASTM A193 Grade B7 Fastener Coatings