Dowel Pin

Also known as / standards: Dowel Pin · Parallel Pin · Straight Pin · DIN 6325 · ISO 2338 · ISO2338 · DIN7 · DIN6325 · ISO8734 · HARDENED DOWEL PIN · m6 · INCH · IMPERIAL · UNC

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About Dowel Pin

Dowel pins locate two parts to each other with a ground, tightly toleranced diameter. They set position, not clamping force, so diameter tolerance matters far more than length.

Also known as Dowel Pin · Parallel Pin · Straight Pin · DIN 6325 · ISO 2338

Standards ISO 2338 · ISO 8734 · DIN 6325 · DIN 7

SUJ2 bearing steel

HRC58-62, ground to m6 — the standard workhorse, wear resistant.

304 stainless

Corrosion resistant for wet, food or outdoor use; softer than SUJ2.

316 stainless

Adds molybdenum for chloride and seawater resistance.

S45C / 12L14 carbon steel

Low cost for general jigs and made-to-order sizes.

Brass / aluminium

Non-magnetic or light duty, lowest strength.

How to choose

• Pick the tolerance first: h6 slips in and can be pulled out, m6 is a press fit.
• A pin can be shortened, never re-sized — choose by diameter.
• Use internally threaded pins where the pin must come out again.