Ribbed Lock Washer

SWR

Ribs formed on both surface sides of the washer are pressed by the screw,s bearing surface and prevent
For locking parts that do not stay with adhesives.
Also appropriate with 12.9 Strength Class Bolts, however, when used with 8.8 Strength Class Bolts, demonstrates a higher locking effectiveness.
Vibration Test Comparison
* Hexagon Bolt used for test: DIN933-8.8-M10X35
Vibration: 15Hz, Amplitude: 0.5mm
Material/Finish
SCM435 (Hardness: 425~495HV), Ferrosoferric Oxide Coating (Black)

unit:mm
Catalog Number	Nominal Size	d	D	t	h	Mass (g)	Q'ty per Pack
SWR-3	3	3.2 0~+0.3	5.5 -0.3~0	0.5	0.9	0.05	20
SWR-4	4	4.3 0~+0.3	7 -0.36~0	0.5	1	0.08	20
SWR-5	5	5.3 0~+0.3	9 -0.36~0	0.6	1.1	0.14	20
SWR-6	6	6.4 0~+0.36	10 -0.36~0	0.7	1.2	0.23	20
SWR-8	8	8.4 0~+0.36	13 -0.43~0	0.8	1.4	0.43	10
SWR-10	10	10.5 0~+0.43	16 -0.43~0	1	1.6	0.82	10
SWR-12	12	13 0~+0.43	18 -0.43~0	1.1	1.7	0.89	10
SWR-16	16	17 0~+0.43	24 -0.52~0	1.3	2.1	1.96	10
SWR-20	20	21 0~+0.52	30 -0.62~0	1.5	2.5	3.42	5

Dimensions & Specifications