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Sales Systems Limited Products and Services > Fasteners > Bolts / Screws > Tapping Screws > Slotted Flat Countersunk Head Tapping Screws > Item # SFCHTS00730XXX  
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Item # SFCHTS00730XXX, Slotted Flat Countersunk Head Tapping Screw, with 0.137" Head 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



Industrial Fasteners Institute



Tapping Screws

Unit of Measure


Nominal Size or Basic Screw Dia.

No. 1

Nominal Size or Basic Screw Dia. (Decimal)

0.0730 in

Applicable to Screw Types1

Length for Types AB and A (L)

3/16 in

Length for Other Types (LT)

5/32 in

Max. Head Dia. (A)

0.137 in

Min. Head Dia. (A)

0.120 in

Ref. Head Height (H)

0.043 in

Max. Slot Width (J)

0.026 in

Min. Slot Width (J)

0.019 in

Max. Slot Depth (T)

0.019 in

Min. Slot Depth (T)

0.012 in

Max. Protrusion Above Gaging Dia. (F)

0.028 in

Min. Protrusion Above Gaging Dia. (F)

0.016 in

Gaging Dia. (G)

0.101 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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