4 mm Taper Pin (Tapered Pin), ISO 2339

A 4 mm taper pin (ISO 2339). Here in 15 lengths from 14 to 55 mm, each as simplified STEP.

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

• Also searched as: 4 mm pin, 4 mm x 14 to 4 mm x 55 pins
• Model id: iso2339-d4
• Standard: ISO 2339:1986 · size 4 mm

Lengths

Length (mm)	Part key	Simplified
14	iso2339-d4x14	STEP
16	iso2339-d4x16	STEP
18	iso2339-d4x18	STEP
20	iso2339-d4x20	STEP
22	iso2339-d4x22	STEP
24	iso2339-d4x24	STEP
26	iso2339-d4x26	STEP
28	iso2339-d4x28	STEP
30	iso2339-d4x30	STEP
32	iso2339-d4x32	STEP
35	iso2339-d4x35	STEP
40	iso2339-d4x40	STEP
45	iso2339-d4x45	STEP
50	iso2339-d4x50	STEP
55	iso2339-d4x55	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Small-end diameter, nominal	3.952	4	4	4	nominal	L1
a	End dome length		0.5 ref		0.5	reference value	L1
taper	Taper (1:x)		50		50	nominal	L1

Drawing

As a PDF: CC-ISO2339-SZ-4.pdf.

The 4 mm taper pin beside the 3 mm and the 5 mm

The 4 mm is number 4, counting from the smallest, of the 7 ISO 2339 taper pins published here, from 2 mm to 8 mm.

• Small-end diameter, nominal (d): 4 mm on the 4 mm taper pin, against 3 mm on the 3 mm and 5 mm on the 5 mm.
• End dome length (a): 0.5 mm (reference) on the 4 mm taper pin, against 0.4 mm (reference) on the 3 mm and 0.63 mm (reference) on the 5 mm.
• Taper (1:x) (taper): 50 mm on the 4 mm taper pin, the same on the 3 mm and the 5 mm.

Other sizes

• One size smaller: 3 mm Taper Pin (Tapered Pin), ISO 2339.
• One size larger: 5 mm Taper Pin (Tapered Pin), ISO 2339.

Documents

• CC-ISO2339-DS-4.pdf: 4 datasheet: values with levels, lengths, sources
• CC-ISO2339-SZ-4.pdf: 4 drawing: this size's values on the views
• parts.json: the part record of every length (the platform contract)

Sources

boltport-iso2339, fasten-it-din-en-22339, fasten-it-iso2339, minibearings-taper-pins, pts-taper-pins. Full citations: the method page and this size's datasheet.

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