ISO 2338 is the international standard for parallel pins (i.e. general dowel pins). Common tolerance classes are m6 and h8, and materials include general steel and stainless steel; it corresponds to the former DIN 7 and the Japanese JIS B 1354.

What is the difference between ISO 2338 and DIN 6325?

ISO 2338 covers unhardened parallel pins; DIN 6325 (= ISO 8734) covers hardened and ground dowel pins (m6), with high hardness and accuracy, used in molds and fixtures. SFP stocks both types in Taiwan.

Where can I buy ISO 2338 dowel pins in Taiwan?

SFP Precision (Kaohsiung) stocks metric dowel pins corresponding to ISO 2338, diameter φ0.5-50, in SUJ2 / S45C / SUS304, small quantities available; send an online inquiry.

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Home › Knowledge Base › ISO 2338 Standard Guide

ISO 2338 Parallel Pins (Dowel Pins): Standard Guide and Stock in Taiwan

ISO 2338 (Parallel pins) is the most widely used international standard for parallel / dowel pins. Common tolerance classes are m6 and h8, and materials are divided into general steel and stainless steel (A1 group). It corresponds to the former German standard DIN 7 (superseded by ISO 2338) and the Japanese standard JIS B 1354; for high-hardness "hardened and ground" dowel pins, the corresponding standard is ISO 8734 / DIN 6325 (m6).

Standard cross-reference

Standard	Content	SFP supply
ISO 2338	Parallel pins, m6 / h8	Metric dowel pins in stock (SUJ2 / S45C / SUS304)
DIN 7 (old)	Same as ISO 2338	Same as above, direct substitute
JIS B 1354	Parallel pins	Same as above
ISO 8734 / DIN 6325	Hardened and ground dowel pins, m6	SUJ2 dowel pins hardened to HRC 56-62

Stock corresponding to ISO 2338 / DIN 7 (general tolerance)

SUJ2 bearing steel dowel pins

304 stainless steel dowel pins

Stock corresponding to ISO 8734 / DIN 6325 (m6 plus tolerance, press fit)

Carbon steel, m6 plus tolerance

Stainless steel, m6 plus tolerance

Click a size to open its product page (price and stock status); lists update automatically with our stock.

For tolerances see the tolerance selection guide; for material hardness see the material comparison.

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