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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.
Unit of Measure

Manufacturer

Manufacturer

Industrial Fasteners Institute

Specifications

Product

Tapping Screws

Unit of Measure

English

Nominal Size or Basic Screw Dia.

No. 10

Nominal Size or Basic Screw Dia. (Decimal)

0.1900 in
Applicable to Screw Types1 1
3
4

Length for Types AB and A (L)

1/2 in

Length for Other Types (LT)

1/2 in

Max. Head Dia. (A)

0.362 in

Min. Head Dia. (A)

0.333 in

Max. Head Height (H)

0.081 in

Min. Head Height (H)

0.068 in

Max. Slot Width (J)

0.060 in

Min. Slot Width (J)

0.0500 in

Max. Slot Depth (T)

0.037 in

Min. Slot Depth (T)

0.024 in

Max. Protrusion Above Gaging Dia. (F)

0.042 in

Min. Protrusion Above Gaging Dia. (F)

0.025 in

Gaging Dia. (G)

0.313 in

Codes and Standards

Codes and Standards

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