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ASME B18.6.3 Combination Slotted Type 1 Cross Recessed Truss

Dimensions of ASME B18.6.3 Combination Slotted Type 1 Cross Recessed Truss Head Machine Screws

Dimensions of ASME B18.6.3 Combination Slotted Type 1 Cross Recessed Truss Head Machine Screws

Nominal Size or Basic Screw DiameterHead Diameter, AHead Height, HSlot Width, WSlot Depth, DRecess Diameter, MRecess Depth, TRecess Width, NDriver SizeRecess Penetration Gaging Depth, P
MaxMinMaxMinMaxMinMaxMinMaxMin
00.1310.1190.0370.0290.0230.0160.0220.0130.0560.0280.01300.0300.012
10.1640.1490.0450.0370.0260.0190.0270.0160.0640.0360.01400.0380.020
20.1940.1800.0530.0440.0310.0230.0310.0200.0970.0500.01810.0520.034
30.2260.2110.0610.0510.0350.0270.0360.0230.1030.0570.01810.0590.042
40.2570.2410.0690.0590.0390.0310.0400.0270.1050.0600.01810.0620.044
50.2890.2720.0780.0660.0430.0350.0450.0300.1210.0760.01910.0780.060
60.3210.3030.0860.0740.0480.0390.0500.0330.1510.0710.02720.0730.048
80.3840.3640.1020.0880.0540.0450.0580.0400.1660.0860.02920.0880.063
100.4480.4250.1180.1030.0600.0500.0680.0480.1810.1020.03020.1040.079
120.5110.4870.1340.1180.0670.0560.0770.0550.2410.1150.03230.1110.086
1/40.5730.5460.1500.1330.0750.0640.0870.0630.2560.1300.03330.1260.101
5/160.6980.6660.1830.1620.0840.07201.060.0760.3450.1800.05940.1730.148
3/80.8230.7870.2150.1910.0940.0810.1240.0900.3760.2140.06340.2060.182
7/160.9480.9070.2480.2210.0940.0810.1420.1040.4070.2440.03840.2370.212
1/21.0731.0280.2800.2500.1060.0910.1610.1180.4370.2750.07240.2680.243
9/161.1981.1490.3120.2790.1180.1020.1790.1310.4390.2900.07440.2820.258
5/81.3231.2690.3450.3090.1330.1160.1960.1460.5470.3050.07750.2890.256
3/41.5731.5110.4100.3680.1490.1310.2340.1640.6080.3680.08550.3510.319

Notes :

  • Where specifying nominal size in decimals, zeros preceding the decimals and in the fourth decimal place shall be omitted.
  • Due to the underfill of material caused by the combination recess, the minimum slot depths are approximately 10% lower than slotted truss heads.