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

Manufacturer

Manufacturer

 N/A Industrial Fasteners Institute

Specifications

Product

 N/A Tapping Screws

Unit of Measure

 N/A English

Type

 N/A Type II

Nominal Size or Basic Screw Dia.

 N/A No. 10

Nominal Size or Basic Screw Dia. (Decimal)

 N/A 0.1900 in
Applicable to Screw Types1 N/A 1
2
3
4

Max. Head Dia. (A)

 N/A 0.373 in

Min. Head Dia. (A)

 N/A 0.357 in

Max. Head Height (H)

 N/A 0.133 in

Min. Head Height (H)

 N/A 0.122 in

Min. Head Radius (R)

 N/A 0.020 in

Ref. Recess Dia. (M)

 N/A 0.232 in

Ref. Recess Depth (T)

 N/A 0.130 in

Ref. Recess Width (N)

 N/A 0.046 in

Driver Size

 N/A 2

Max. Recess Penetration Gaging Depth

 N/A 0.118 in

Min. Recess Penetration Gaging Depth

 N/A 0.104 in

Codes and Standards

Codes and Standards

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