8 mm Internal Retaining Ring (Bore Circlip), DIN 472

The 8 mm internal retaining ring (DIN 472) fits an 8 mm bore with a groove diameter of 8.4 mm, and is 0.8 mm thick. Here as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: 8 mm circlip
• Model id: din472-d8
• Standard: DIN 472:2017 · size 8 mm

Files

Part key	Simplified
din472-d8	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
s	Ring thickness		0.8		0.8	nominal	L1
s_lim	Ring thickness, limits	0.75		0.8	0.775	midpoint of min–max	L0 (max: one source)
d3	Free diameter		8.7		8.7	nominal	L1
d3_lim	Free diameter, limits	8.6		9.06	8.83	midpoint of min–max	L1
a	Lug height			2.4	2.4	single limit (max), modeled at the limit	L1
b	Radial width		1.1 ref		1.1	reference value	L1
d5	Plier hole diameter	1			1	single limit (min), modeled at the limit	L1
d2	Groove diameter		8.4		8.4	nominal	L1
m	Groove width		0.9		0.9	nominal	L1
n	Groove edge margin	0.6			0.6	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-DIN472-SZ-8.pdf.

The 8 mm internal retaining ring beside the 9 mm

The 8 mm is the smallest of the 17 DIN 472 internal retaining rings published here, from 8 mm to 25 mm.

• Ring thickness (s): 0.8 mm on the 8 mm internal retaining ring, the same on the 9 mm.
• Ring thickness, limits (s_lim): 0.75 to 0.8 mm on the 8 mm internal retaining ring, the same on the 9 mm.
• Free diameter (d3): 8.7 mm on the 8 mm internal retaining ring, against 9.8 mm on the 9 mm.
• Free diameter, limits (d3_lim): 8.6 to 9.06 mm on the 8 mm internal retaining ring, against 9.7 to 10.16 mm on the 9 mm.
• Lug height (a): up to 2.4 mm on the 8 mm internal retaining ring, against up to 2.5 mm on the 9 mm.
• Radial width (b): 1.1 mm (reference) on the 8 mm internal retaining ring, against 1.3 mm (reference) on the 9 mm.
• Plier hole diameter (d5): at least 1 mm on the 8 mm internal retaining ring, the same on the 9 mm.
• Groove diameter (d2): 8.4 mm on the 8 mm internal retaining ring, against 9.4 mm on the 9 mm.

Other sizes

• One size larger: 9 mm Internal Retaining Ring (Bore Circlip), DIN 472, 9 mm bore, 9.4 mm groove, 0.8 mm thick.

Documents

• CC-DIN472-DS-8.pdf: 8 datasheet: values with levels, sources
• CC-DIN472-SZ-8.pdf: 8 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

fasten-it-din472, fasteners-eu-din472, hc-maschinentechnik-din472, seeger-din472. Full citations: the method page and this size's datasheet.

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