• Each end shall be square with the axis of each arm within 4 deg, and edges may be sharp or chamfered at the option of the manufacturer. The chamfer shall not exceed the values listed.
  • Any truncation or rounding of hexagon corners within the specified across-corner dimensions shall be evident on all corners.
  • Material (Steel Alloy). Hexagon keys and bits shall be fabricated from an alloy steel having two or more of the following alloying elements: chromium, nickel, molybdenum, or vanadium, in
  • more
Unit of Measure

Manufacturer

Manufacturer

Industrial Fasteners Institute

Specifications

Product

Socket Screws

Unit of Measure

English

Nominal Key or Bit and Socket Size

5/32 in

Nominal Key or Bit and Socket Size (Decimal)

0.156 in

Max. Hexagon Width Across Flats (W)

0.1562 in

Min. Hexagon Width Across Flats (W)

0.1547 in

Max. Hexagon Width Across Corners (Y)

0.1774 in

Min. Hexagon Width Across Corners (Y)

0.1745 in

Max. Length (B)

0.938 in

Min. Length (B)

0.750 in

Max. Short Arm Series Length (C)

2.594 in

Min. Short Arm Series Length (C)

2.406 in

Max. Long Arm Series Length (C)

4.219 in

Min. Long Arm Series Length (C)

4.031 in

Min. Radius of Bend (R)

0.156 in

Max. Chamfer (K)

0.016 in

Codes and Standards

Codes and Standards

ASME B18.3 2002
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