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Sales Systems Limited Products and Services > Fasteners Reference Guide > Bolts / Screws > Tapping Screws > Type IA Cross Recessed Oval Countersunk Trim Head Tapping Screws > Item # item-3071  
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Item # item-3071, Type IA Short Screw, with 0.162" Recess Dia.


This type of recess has a large center opening, wide straight wings, and blunt bottom, with all edges relieved or rounded.

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.




Manufacturer  · Specifications  · Codes and Standards

Manufacturer

Manufacturer
Industrial Fasteners Institute


Specifications

Product
Tapping Screws

Unit of Measure
English

Type
Type IA Short Screws

Nominal Size or Basic Screw Dia.
No. 8

Nominal Size or Basic Screw Dia. (Decimal)
0.1640 in

Head Size
5

Applicable to Screw Types1

Ref. Recess Dia. (M)
0.152 in

Ref. Recess Depth ((T)
0.080 in

Ref. Recess Width (N)
0.041 in

Driver Size
2

Max. Recess Penetration Gaging Depth
0.074 in

Min. Recess Penetration Gaging Depth
0.056 in

Max. Protrusion Above Gaging Dia. (F)
0.075 in

Min. Protrusion Above Gaging Dia. (F)
0.053 in

Gaging Dia. (G)
0.196 in
1 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square


Codes and Standards

Codes and Standards
Abstract of ASME B18.6.4 1998


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Type Designations for Tapping Screws and Metallic Drive Screws
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