Spline socket keys and bits dimensions chart according to ASME B18.3-2003 standard.
Spline socket keys and bits are tools which are used
to drive screws with a spline socket . Spline Keys are furnished as Short
Arm Series or Long Arm Series.
Some important notes from the ASME B18.3:
- Spline 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 ensure that the specified
minimum hardness of 48 HRC at the surface for nominal sizes up to and including 0.372 in., and 45 HRC for nominal sizes
over 0.372 in., is met when spline keys and bits are hardened by quenching from the austenitizing temperature and
Note1: For plated spline keys and bits, all dimensions are before plating.
Note2: Bits are available, but lengths have not been standardized.
Designation: Product Name, Designation of the
Standard, Nominal Key or Bit Size, Series, Protective Finish (if required) Ex: ASME B18.3,
0.111 Short Arm Series
Wrench: A mechanical hand tool which is used to hold, twist, or turn an object (such as a bolt or nut).