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

The 25 mm internal retaining ring (DIN 472) fits a 25 mm bore with a groove diameter of 26.2 mm, and is 1.2 mm thick. Here as simplified STEP files.

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

• Also searched as: 25 mm circlip
• Model id: din472-d25
• Standard: DIN 472:2017 · size 25 mm

Files

Part key	Simplified
din472-d25	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
s	Ring thickness		1.2		1.2	nominal	L1
s_lim	Ring thickness, limits	1.14		1.2	1.17	midpoint of min–max	L0 (max: one source)
d3	Free diameter		26.9		26.9	nominal	L1
d3_lim	Free diameter, limits	26.69		27.32	27.005	midpoint of min–max	L1
a	Lug height			4.5	4.5	single limit (max), modeled at the limit	L1
b	Radial width		2.7 ref		2.7	reference value	L1
d5	Plier hole diameter	2			2	single limit (min), modeled at the limit	L1
d2	Groove diameter		26.2		26.2	nominal	L1
m	Groove width		1.3		1.3	nominal	L1
n	Groove edge margin	1.8			1.8	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-DIN472-SZ-25.pdf.

The 25 mm internal retaining ring beside the 24 mm

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

• Ring thickness (s): 1.2 mm on the 25 mm internal retaining ring, the same on the 24 mm.
• Ring thickness, limits (s_lim): 1.14 to 1.2 mm on the 25 mm internal retaining ring, the same on the 24 mm.
• Free diameter (d3): 26.9 mm on the 25 mm internal retaining ring, against 25.9 mm on the 24 mm.
• Free diameter, limits (d3_lim): 26.69 to 27.32 mm on the 25 mm internal retaining ring, against 25.69 to 26.32 mm on the 24 mm.
• Lug height (a): up to 4.5 mm on the 25 mm internal retaining ring, against up to 4.4 mm on the 24 mm.
• Radial width (b): 2.7 mm (reference) on the 25 mm internal retaining ring, against 2.6 mm (reference) on the 24 mm.
• Plier hole diameter (d5): at least 2 mm on the 25 mm internal retaining ring, the same on the 24 mm.
• Groove diameter (d2): 26.2 mm on the 25 mm internal retaining ring, against 25.2 mm on the 24 mm.

Other sizes

• One size smaller: 24 mm Internal Retaining Ring (Bore Circlip), DIN 472, 24 mm bore, 25.2 mm groove, 1.2 mm thick.

Documents

• CC-DIN472-DS-25.pdf: 25 datasheet: values with levels, sources
• CC-DIN472-SZ-25.pdf: 25 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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