1high quality with low price 2.we have stock for size 4mm to 200 3. supplier to BOSCH retaining washer

Material	OD Size	Finish	Packing	Payment term
Spring steel	4mm-200mm	Black	antirust paper	T/T
SS304	4mm-200mm	Phosphating	Carton box 25kg	L/C
Brass	4mm-200mm	zinc-plated	as required

Most retaining ring are coiled from spring steel, SAE1060-1095, with hardness range RC42-52. These rings are available in a variety of gap styles to fit your application.

retaining washer 

retaining washer(DIN472)