SPLIT LOCK WASHER DIMENSIONS (INCH SERIES)

Split Lock Washer Dimensions are shown in the following chart according to ASME B18.21.1-2009 standard. All dimensions are in inches. Split lock washers from #0 to 3 inches nominal size are given. 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.

Split Lock Washer Dimensions:

INPUT PARAMETERS
Nominal split lock washer size	No.2 No.3 No.4 No.5 No.6 No.8 No.10 No.12 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16 1 1 1/16 1 1/8 1 3/16 1 1/4 1 5/16 1 3/8 1 7/16 1 1/2 1 5/8 1 3/4 1 7/8 2 2 1/4 2 1/2 2 3/4 3

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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)