Item # CRUFCHTSII03125XXX, Type II Cross Recessed Undercut Flat Countersunk Head Tapping Screw, 0.3125" Nominal Dia. On Sales Systems Ltd.

When specifying nominal size in decimals, zeros preceding decimal and in the fourth decimal place shall be omitted.
Head dimensions not shown are the same as those of slotted heads.
Not practical to gage sizes No. 0 and No. 1.

This type of recess consists of two intersecting slots with parallel sides converging to a slightly truncated apex at bottom of recess.

Unit of Measure

Manufacturer | Specifications | Codes and Standards

N/A Industrial Fasteners Institute

Product	N/A Tapping Screws
Unit of Measure	N/A English
Type	N/A Type II
Nominal Size or Basic Screw Dia.	N/A 5/16 in
Nominal Size or Basic Screw Dia. (Decimal)	N/A 0.3125 in
Ref. Recess Dia. (M)	N/A 0.381 in
Ref. Recess Depth (T)	N/A 0.218 in
Ref. Recess Width (N)	N/A 0.066 in
Driver Size	N/A Point Same on all Drivers
Max. Recess Penetration Gaging Depth	N/A 0.218 in
Min. Recess Penetration Gaging Depth	N/A 0.198 in

N/A Abstract of ASME B18.6.4 1998

Manufacturer