Item # HKB1250XXX, Hexagon Key and Bit, 1.250" Nominal Dia. On Sales Systems Ltd.

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

Unit of Measure

Manufacturer | Specifications | Codes and Standards

Industrial Fasteners Institute

Product	N/A Socket Screws
Unit of Measure	N/A English
Nominal Key or Bit and Socket Size	N/A 1-1/4 in
Nominal Key or Bit and Socket Size (Decimal)	N/A 1.2500 in
Max. Hexagon Width Across Flats (W)	N/A 1.2500 in
Min. Hexagon Width Across Flats (W)	N/A 1.2430 in
Max. Hexagon Width Across Corners (Y)	N/A 1.4337 in
Min. Hexagon Width Across Corners (Y)	N/A 1.4138 in
Max. Length (B)	N/A 3.250 in
Min. Length (B)	N/A 2.750 in
Max. Short Arm Series Length (C)	N/A 11.500 in
Min. Short Arm Series Length (C)	N/A 11.000 in
Min. Radius of Bend (R)	N/A 1.250 in
Length of Bit (L)	N/A 3.750 in
Tolerance for L	N/A ±0.062 in
Max. Chamfer (K)	N/A 0.092 in

ASME B18.3 2002

Manufacturer