1 mm Split Pin (Cotter Pin), ISO 1234

All 8 lengths from 6 to 20 mm, each as simplified STEP: one 1 mm split pin (ISO 1234).

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

• Also searched as: 1 mm split pin, 1 mm x 6 to 1 mm x 20 split pins
• Model id: iso1234-d1
• Standard: ISO 1234:1997 · size 1 mm

Lengths

Length (mm)	Part key	Simplified
6	iso1234-d1x6	STEP
8	iso1234-d1x8	STEP
10	iso1234-d1x10	STEP
12	iso1234-d1x12	STEP
14	iso1234-d1x14	STEP
16	iso1234-d1x16	STEP
18	iso1234-d1x18	STEP
20	iso1234-d1x20	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Pin diameter	0.8		0.9	0.85	midpoint of min–max	L2
a	Extended prong	0.8		1.6	1.2	midpoint of min–max	L2
b	Eye length		3 ref		3	reference value	L2
c	Eye width	1.6		1.8	1.7	midpoint of min–max	L2

Drawing

As a PDF: CC-ISO1234-SZ-1.pdf.

The 1 mm split pin beside the 0.8 mm and the 1.2 mm

The 1 mm is number 3, counting from the smallest, of the 6 ISO 1234 split pins published here, from 0.6 mm to 2 mm.

• Pin diameter (d): 0.8 to 0.9 mm on the 1 mm split pin, against 0.6 to 0.7 mm on the 0.8 mm and 0.9 to 1 mm on the 1.2 mm.
• Extended prong (a): 0.8 to 1.6 mm on the 1 mm split pin, against 0.8 to 1.6 mm on the 0.8 mm and 1.25 to 2.5 mm on the 1.2 mm.
• Eye length (b): 3 mm (reference) on the 1 mm split pin, against 2.4 mm (reference) on the 0.8 mm and 3 mm (reference) on the 1.2 mm.
• Eye width (c): 1.6 to 1.8 mm on the 1 mm split pin, against 1.2 to 1.4 mm on the 0.8 mm and 1.7 to 2 mm on the 1.2 mm.

Other sizes

• One size smaller: 0.8 mm Split Pin (Cotter Pin), ISO 1234.
• One size larger: 1.2 mm Split Pin (Cotter Pin), ISO 1234.

Documents

• CC-ISO1234-DS-1.pdf: 1 datasheet: values with levels, lengths, sources
• CC-ISO1234-SZ-1.pdf: 1 drawing: this size's values on the views
• parts.json: the part record of every length (the platform contract)

Sources

amesweb-iso1234, fasten-it-iso1234, fasteners-eu-iso1234, iso1234-1997-sample. Full citations: the method page and this size's datasheet.

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