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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
Not practical to gage.
Unit of Measure

Manufacturer

Manufacturer

 N/A Industrial Fasteners Institute

Specifications

Product

 N/A Tapping Screws

Unit of Measure

 N/A English

Nominal Size or Basic Screw Dia.

 N/A No. 1

Nominal Size or Basic Screw Dia. (Decimal)

 N/A 0.0730 in
Applicable to Screw Types1 N/A 1
3

Length for Types AB and A (L)

 N/A 3/16 in

Length for Other Types (LT)

 N/A 5/32 in

Max. Head Dia. (A)

 N/A 0.137 in

Min. Head Dia. (A)

 N/A 0.120 in

Max. Head Height (H)

 N/A 0.031 in

Min. Head Height (H)

 N/A 0.023 in

Max. Slot Width (J)

 N/A 0.026 in

Min. Slot Width (J)

 N/A 0.019 in

Max. Slot Depth (T)

 N/A 0.014 in

Min. Slot Depth (T)

 N/A 0.009 in

Codes and Standards

Codes and Standards

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