ASME B18.21.2M Washers | McMaster-Carr

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7 Products

Split Lock Washers

Stop nuts and screws from loosening due to mild vibration. As you tighten, the uneven ends bite into the nut or screw so it won't back out. While they're not as vibration resistant as other lock washers, they are a great fit for electrical panels, light fixtures, and other light duty assemblies. Split lock washers are not reusable, and they only work with fasteners that have right-hand threads.

Blue-Dyed Steel—These metric-sized washers have a distinctive blue color, so you can easily tell them apart from inch washers. The coating provides only minimal corrosion resistance, so these washers are best for dry environments.

	ID, mm	OD, mm	Thk., mm	Specs. Met	Pkg. Qty.		Pkg.
Blue-Dyed Steel



	M6	6.2	12.1	2.0	ASME B18.21.2M	100	93279A100	000000


	M8	8.2	15.2	2.5	ASME B18.21.2M	100	93279A200	0000
	M10	10.2	18.0	2.9	ASME B18.21.2M	50	93279A300	0000
	M12	12.3	21.7	3.8	ASME B18.21.2M	100	93279A400	00000
	M16	16.4	27.9	4.8	ASME B18.21.2M	25	93279A500	00000
	M20	20.5	33.8	5.7	ASME B18.21.2M	10	93279A600	0000
	M24	24.5	40.7	7.2	ASME B18.21.2M	10	93279A700	00000