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Sales Systems Limited Products and Services > Fasteners Reference Guide > Bolts / Screws > Tapping Screws > Hex Washer Head Tapping Screws > Item # HWHTS00990XXX  
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Item # HWHTS00990XXX, Hex Washer Head Tapping Screw, with 0.0990" Nominal Dia.


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.




Manufacturer  · Specifications  · Codes and Standards

Manufacturer

Manufacturer
Industrial Fasteners Institute


Specifications

Product
Tapping Screws

Unit of Measure
English

Nominal Size or Basic Screw Dia.
No. 3

Nominal Size or Basic Screw Dia. (Decimal)
0.0990 in

Applicable to Screw Types1

Max. Width Across Flats (A)
0.125 in

Min. Width Across Flats (A)
0.120 in

Min. Width Across Corners (W)
0.134 in

Max. Head Height (H)
0.055 in

Min. Head Height (H)
0.044 in

Max. Washer Dia. (B)
0.177 in

Min. Washer Dia. (B)
0.163 in

Max. Washer Thickness (U)
0.016 in

Min. Washer Thickness (U)
0.010 in

Min. Protrusion Beyond Gaging Ring (F)
0.026 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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