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Applicable to screw types as indicated by code symbols.
  • Type A thread forming, except for short lengths.
Unit of Measure

Manufacturer

Manufacturer

Industrial Fasteners Institute

Specifications

Product

Tapping Screws

Unit of Measure

English

Type

Type I Short Screws

Nominal Size or Basic Screw Dia.

No. 14

Nominal Size or Basic Screw Dia. (Decimal)

0.2420 in

Head Size

12
Applicable to Screw Types1 2

Ref. Recess Dia. (M)

0.264 in

Ref. Recess Depth (T)

0.140 in

Ref. Recess Width (N)

0.038 in

Driver Size

3

Max. Recess Penetration Gaging Depth

0.135 in

Min. Recess Penetration Gaging Depth

0.111 in

Max. Protrusion Above Gaging Dia. (F)

0.133 in

Min. Protrusion Above Gaging Dia. (F)

0.084 in

Gaging Dia. (G)

0.362 in

Codes and Standards

Codes and Standards

Abstract of ASME B18.6.4 1998
  • 1 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square