SPLIT LOCK WASHER DIMENSIONS (INCH SERIES)

Split Lock Washer Dimensions are shown in the following chart according to ASME B18.21.1-2009 standard. Split lock washers from #0 to 3 inches nominal size are covered in the chart. Split lock washers are available in four series which are regular, heavy, extra duty and high collar.

A split lock washer (or a helical spring lock washer) is a type of washer with slightly trapezoidal wire formed into a helix of one coil.

Some important notes from the ASME B18.21.1:

- Split lock washers compensate for developed looseness between component parts of an assembly, and provide a hardened bearing surface.

- Split lock washers shall be produced from material complaint to chemical composition requirements of the standards given in ASME B18.21.1 (Carbon Steel: SAE J403 1055–1065, Boron Steel: SAE J411 10B55–10B65, Stainless Steel: SAE J405 302–305 or SAE J405 316) Visit ASME B18.21.1 for more information.

Calculator:

INPUT PARAMETERS
Nominal split lock washer size

 


Dimensions of Helical Spring Lock Washers
RESULTS    
Washer
Size
Series Inside Dia
(A)
Maximum
Outside
Dia
(Bmax)
Minimum
Mean
Section
Thickness
(Tmin)
Minimum
Section
Width
(Wmin)
Minimum
Bearing
Width
(BWmin)
Max Min
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Note 1: Dimensions are in inches.
Note 2: Nominal washer sizes are intended for use with comparable nominal screw or bolt sizes.

Reference:
  • ASME B18.21.1-2009, Washers: Helical Spring-Lock, Tooth Lock, and Plain Washers (Inch Series)