Metric Tapered Section Rings Options

Tapered Section DIN Metric Circlips and Retaining Rings

Type	P/N Suffix	Reference Spec	Description
Carbon Spring Steel	(none)	DIN 17221-17223	Standard material for tapered section DIN metric circlips.
Stainless Steel	SS	DIN 1.4122	Standard grade of stainless for DIN metric circlips. Stainless steel with very good wear and corrosion reistance. Similar properties and characteristics to 420 stainless steel.
Beryllium Copper	C	Alloy #25	Copper alloy with extremely high resistance to most atmospheric corrosion.
Phosphor Bronze	PB	PB102 or CUSN8	PB102 is a Phosphor Bronze made up mainly of Copper. Zinc and Tin are sometimes added to improve circlip strength, hardness, corrosion resistance and wear resistance.

Type	P/N Suffix	Reference Spec	Description
Phosphate	(none)		Default finish for retaining rings and circlips made from carbon steel material.
Dry Phosphate	DP		Phosphate finish with dry to the touch oil.
Plain Finish (no Phospate)	SF		Part supplied without standard phosphate finish. Will negatively affect rings corrosion resistance.
Zinc Dichromate	ZD	ASTM B695, Class 5, Type II	Mechanically applied zinc plating with a dichromate dip. Color varies.
Zinc Dichromate + Lacquer	ZDL		Same as zinc dichromate (ZD) with added lacquer for extending corrosion resistance.
Zinc Clear Chromate	ZF	ASTM B695, Class 5, Type I	Mechanically applied zinc plating with a clear chromate dip. Color is typically bright silver.
Zinc Trivalent	ZT	ASTM B695, Class 5, Type I	Mechanically applied zinc plating. Plating is RoHS compliant.
Cadmium Dichromate	MD	AMS QQ P-416, Type II, Class 2	Cadmium plating with a dichromate dip. Ideal for surfaces exposed to stagnant water, salt water, marine atmospheres.
Cadmium Clear Chromate	MF	AMS QQ P-416, Type II, Class 1	Cadmium plating with an iridite dip (clear).
Nickle Plated	NI		Bright silver coating.
Black Oxide	BX	MIL-C-13924 Class 1	Produces a uniform satin black finish on carbon steel. Its corrosion resistance is inferior to phosphate. Cannot be applied to stainless steel.

Type	P/N Suffix	Description
Bulk	(none)	Default packaging
Tape Stacked	TPD	Rings are stacked and aligned, then special tape is used to hold stack in place. Availability of tape stacking is dependent on ring size and finish.
Stacked	STK	Rings are stacked and aligned, then held in place using either rods, wire or shrink wrap depending on availability and customer preference.