Dimensions of ASME B18.6.3 Type 1 Cross Recessed Binding Head Machine Screws

Dimensions of ASME B18.6.3 Type 1 Cross Recessed Binding Head Machine Screws

Nominal Size or Basic Screw DiameterHead Diameter, ATotal Head Height, OHead Oval Height, FRecess Diameter, MRecess Depth, TRecess Width, NDriver SizeRecess Penetration Gaging Depth
MaxMinMaxMinMaxMinMaxMin
00.1260.1190.0320.0260.0120.0080.0600.0310.01300.0330.016
10.1530.1450.0410.0350.0150.0110.0670.0380.01400.0400.023
20.1810.1710.0500.0430.0180.0130.0930.0490.01710.0510.034
30.2080.1970.0590.0520.0220.0160.1030.0590.01710.0610.044
40.2350.2230.0680.0610.0250.0180.1110.0680.01710.0700.052
50.2630.2490.0780.0690.0290.0210.1410.0630.02520.0640.040
60.2900.2750.0870.0780.0320.0240.1530.0760.02620.0770.053
80.34403260.1050.0950.0390.0290.1790.1020.02820.1030.079
100.3990.3780.1230.1120.0450.0340.1980.1210.02920.1230.098
120.4540.4300.1410.1300.0520.0390.2600.1380.03230.1340.109
1/40.5250.4980.1650.1520.0610.0460.2740.1520.04630.1470.123
5/160.6560.6220.2090.1940.0770.0590.3430.1830.06840.1750.152
3/80.7880.7460.2530.2350.0940.0710.3930.2350.07640.2270.203

Notes :

  • Break sharp edge on head where spherical and conical surfaces meet.
  • Where specifying nominal size in decimals, zeros preceding the decimals and in the fourth decimal place shall be omitted.