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Sales Systems Limited Products and Services > Fasteners > Bolts / Screws > Tapping Screws > Hex Washer Head Tapping Screws > Item # HWHTS01120XXX  
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Item # HWHTS01120XXX, Hex Washer Head Tapping Screw, with 0.1120" 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.
  • Type C thread forming and Types D, F, G, and T thread cutting.

Manufacturer  · Specifications  · Codes and Standards



Industrial Fasteners Institute



Tapping Screws

Unit of Measure


Nominal Size or Basic Screw Dia.

No. 4

Nominal Size or Basic Screw Dia. (Decimal)

0.1120 in

Applicable to Screw Types1

Max. Width Across Flats (A)

0.188 in

Min. Width Across Flats (A)

0.181 in

Min. Width Across Corners (W)

0.202 in

Max. Head Height (H)

0.060 in

Min. Head Height (H)

0.049 in

Max. Washer Dia. (B)

0.243 in

Min. Washer Dia. (B)

0.225 in

Max. Washer Thickness (U)

0.019 in

Min. Washer Thickness (U)

0.011 in

Min. Protrusion Beyond Gaging Ring (F)

0.029 in
1 1 = Circle, 2 = Diamond, 3 = Triangle, 4 = Square

Codes and Standards

Codes and Standards

Abstract of ASME B18.6.4 1998


Type Designations for Tapping Screws and Metallic Drive Screws
(PDF, 206KB)

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