What are the common dowel pin standards?

The common ones are ISO 2338 (parallel pins), ISO 8734 / DIN 6325 (hardened and ground dowel pins) and JIS B 1354; general metric specifications are also widely used in Taiwan.

What is the most common dowel pin material?

The most common is SUJ2 bearing steel (hardened, HRC 56-62); for corrosion resistance use SUS304 stainless steel; S45C is the medium-hardness option (HRC 36-42).

Where can I buy dowel pins in small quantities in Taiwan?

SFP Precision (Kaohsiung) stocks metric and inch dowel pins in Taiwan, small quantities available. Check stock in the online catalog or send an online inquiry.

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Home › Knowledge Base › Dowel Pin Selection Guide

Dowel Pin Selection Guide | Standards, Materials, Tolerances

Dowel pins are used for precise positioning in jigs, molds and machine assemblies. Common standards: ISO 2338 (parallel pins), ISO 8734 / DIN 6325 (hardened and ground dowel pins) and JIS B 1354. SFP stocks metric and inch dowel pins in Taiwan; small quantities available.

Choosing a material

Material	Hardness (SFP standard)	Characteristics / use
SUJ2 bearing steel	HRC 56-62 (hardened)	Most common; high hardness and wear resistance; first choice for general jig / mold positioning
S45C medium carbon steel	HRC 36-42	Medium hardness; general structural positioning
SUS304 stainless steel	Not heat treated	Corrosion resistance (food, electronics, humid environments); lower hardness

Tolerance types

Three common types: minus tolerance (diameter 0/−0.02, SFP standard for general positioning), h7, and plus tolerance (+0.005/0, precision positioning / press fit). See the dowel pin tolerance guide.

Stock diameters (metric)

φ0.5, φ0.55, φ0.6, φ0.65, φ0.7, φ0.75, φ0.8, φ0.85, φ0.9, φ0.95, φ1, φ1.05, φ1.1, φ1.14, φ1.15, φ1.2, φ1.22, φ1.23, φ1.25, φ1.3, φ1.32, φ1.4, φ1.42, φ1.43, φ1.45, φ1.48, φ1.5, φ1.52, φ1.53, φ1.54, φ1.55, φ1.56, φ1.57, φ1.58, φ1.59, φ1.6, φ1.61, φ1.64, φ1.65, φ1.68 …

SUJ2 bearing steel dowel pins (in stock)

0.5*4 0.6*16 0.7*16 0.8*4 0.8*5 0.8*7.8 0.8*16 0.9*7 0.9*16 1*2 1*2.8 1*3 1*3.2 1*4 1*4.7 1*4.8 1*5 1*5.1 1*5.3 1*5.5 1*6 1*6.5 1*6.8 1*7 1*7.5 1*7.8 1*8 1*8.3 1*8.4 1*9 1*9.8 1*10 1*10.5 1*11 1*12 1*14 1*15 1*16 1*18 1*19 1*20 1*22 1*24 1*25 1*26 1*28 1*30 1*34 1*36.5 1.05*2.9 1.05*6.5 1.1*5.3 1.1*5.5 1.1*5.7 1.1*6 1.1*6.5 1.1*7.7 1.1*8 1.1*10 1.1*12 … more sizes: search the interactive catalog

304 stainless steel dowel pins (in stock)

m6 plus-tolerance dowel pins (press fit, corresponding to ISO 8734 / DIN 6325)

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

📂 All dowel pin categories & stock 📐 ISO 2338 standard guide

Need a quote? Email your part list (Excel supported) to sfp@sfp-tw.com or give us a call. For parts you found on overseas platforms such as McMaster-Carr or MISUMI, we can also help check which equivalent items are available in Taiwan. You can also check stock status in the interactive catalog.

🔍 Interactive catalog 📚 More guides