Hexagon Keys and Bits 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 sufficient quantity to assure that the specified minimum hardness of 48 HRC at the surface for sizes up to and including 3/8 in., and 45 HRC for sizes over 3/8 in., is met when hexagon keys and bits are hardened by quenching from the austenitizing temperature and tempered.

Item #	Description	Nominal Size or Basic Product Dia.	Max. (W)	Max. (Y)	Max. (B)	Max. Short Arm Series (C)	Min. (R)
HKB2000XXX	N/A Hexagon Key and Bit, 2.000" Nominal Dia.	N/A 2 in	N/A 2.0000 in	N/A 2.2939 in	N/A 4.750 in	N/A 17.500 in	N/A 2.000 in
HKB2250XXX	N/A Hexagon Key and Bit, 2.250" Nominal Dia.	N/A 2-1/4 in	N/A 2.2500 in	N/A 2.5807 in	N/A 5.250 in	N/A 19.500 in	N/A 2.250 in
HKB2750XXX	N/A Hexagon Key and Bit, 2.750" Nominal Dia.	N/A 2-3/4 in	N/A 2.7500 in	N/A 3.1541 in	N/A 6.250 in	N/A 23.500 in	N/A 2.750 in
HKB3000XXX	N/A Hexagon Key and Bit, 3.000" Nominal Dia.	N/A 3 in	N/A 3.0000 in	N/A 3.4409 in	N/A 6.750 in	N/A 25.500 in	N/A 3.000 in