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Sales Systems Limited Products and Services > Fasteners > Bolts / Screws > Tapping Screws > Cross Recessed Fillister Head Tapping Screws > Item # CRFHTSII02500XXX  
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Item # CRFHTSII02500XXX, Type II Cross Recessed Fillister Head Tapping Screw, 0.2500" Nominal Dia.

Applicable to screw types as indicated by code symbols.
  • Type AB thread forming.
  • Types B and BP thread forming and Types BF and BT thread cutting.
  • Type C thread forming and Types D, F, G, and T thread cutting.
This type of recess consists of two intersecting slots with parallel sides converging to a slightly truncated apex at bottom of recess.

Manufacturer  · Specifications  · Codes and Standards



Industrial Fasteners Institute



Tapping Screws

Unit of Measure



Type II

Nominal Size or Basic Screw Dia.

1/4 in

Nominal Size or Basic Screw Dia. (Decimal)

0.2500 in

Applicable to Screw Types1

Ref. Recess Dia. (M)

0.299 in

Ref. Recess Depth (T)

0.174 in

Ref. Recess Width (N)

0.054 in

Driver Size

Point Same on all Drivers

Max. Recess Penetration Gaging Depth

0.163 in

Min. Recess Penetration Gaging Depth

0.147 in
1 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square

Codes and Standards

Codes and Standards

Abstract of ASME B18.6.4 1998


Type Designations for Tapping Screws and Metallic Drive Screws
(PDF, 206KB)

Distributor of Industry Standard and Military Specification Threaded Fasteners