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Sales Systems Limited Products and Services > Fasteners > Bolts / Screws > Tapping Screws > Hex Washer Head Tapping Screws > Item # HWHTS02420XXX  
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Item # HWHTS02420XXX, Hex Washer Head Tapping Screw, with 0.2420" Nominal Dia.

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

Manufacturer  · Specifications  · Codes and Standards



Industrial Fasteners Institute



Tapping Screws

Unit of Measure


Nominal Size or Basic Screw Dia.

No. 14

Nominal Size or Basic Screw Dia. (Decimal)

0.2420 in

Applicable to Screw Types1

Max. Width Across Flats (A)

0.375 in

Min. Width Across Flats (A)

0.367 in

Min. Width Across Corners (W)

0.409 in

Max. Head Height (H)

0.190 in

Min. Head Height (H)

0.172 in

Max. Washer Dia. (B)

0.520 in

Min. Washer Dia. (B)

0.480 in

Max. Washer Thickness (U)

0.050 in

Min. Washer Thickness (U)

0.030 in

Min. Protrusion Beyond Gaging Ring (F)

0.103 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)

Distributor of Industry Standard and Military Specification Threaded Fasteners