Full-Groove Dowel Pins
Grooves run the full length of these pins for a firm hold that won't spin. Use them in place of standard dowel, spring, and taper pins to fasten parts. The three grooves pinch shut when pressed into a hole, creating tension to lock pins in place. For the best fit, the hole should be equal to or slightly larger than the diameter shown. The ends are chamfered for easy insertion. Breaking strength is measured as double shear, which is the force required to break a pin into three pieces. Also known as type A pins.
Pins with tapered grooves are easier to install than pins with parallel grooves, but more likely to loosen from vibration. Pins that meet ISO 8744 comply with international standards for tapered-groove metric dowel pins.
Pins with parallel grooves fit more tightly than pins with tapered grooves, so they’re less likely to loosen from vibration. However, they require more force to insert. Pins that meet ISO 8740 comply with international standards for parallel-groove metric dowel pins.
Zinc-plated steel pins have good strength and some corrosion resistance.
18-8 stainless steel pins offer a balance of strength and corrosion resistance. They may be mildly magnetic. Pins are passivated for added protection against corrosion and oxidation.
For technical drawings and 3-D models, click on a part number.
| Lg. | Dia. (A) | Dia. (A) Tolerance | Dia. (B) | Dia. (B) Tolerance | Breaking Strength, lbs. | Groove Style | Pkg. Qty. | Pkg. | |
3/32" Dia. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/4" | 0.094" | -0.002" to 0" | 0.101" | -0.003" to 0.003" | 850 | Tapered | 25 | 000000000 | 000000 |
| 1/2" | 0.094" | -0.002" to 0" | 0.101" | -0.003" to 0.003" | 850 | Tapered | 25 | 000000000 | 00000 |
1/8" Dia. | |||||||||
| 1/2" | 0.125" | -0.002" to 0" | 0.134" | -0.003" to 0.003" | 1,600 | Tapered | 25 | 000000000 | 00000 |
| 3/4" | 0.125" | -0.002" to 0" | 0.134" | -0.003" to 0.003" | 1,600 | Tapered | 25 | 000000000 | 00000 |
| 1" | 0.125" | -0.002" to 0" | 0.133" | -0.003" to 0.003" | 1,600 | Tapered | 25 | 000000000 | 00000 |
5/32" Dia. | |||||||||
| 1/2" | 0.156" | -0.002" to 0" | 0.166" | -0.003" to 0.003" | 2,300 | Tapered | 25 | 000000000 | 00000 |
| 3/4" | 0.156" | -0.002" to 0" | 0.166" | -0.003" to 0.003" | 2,300 | Tapered | 25 | 000000000 | 00000 |
| 1" | 0.156" | -0.002" to 0" | 0.165" | -0.003" to 0.003" | 2,300 | Tapered | 25 | 000000000 | 00000 |
3/16" Dia. | |||||||||
| 1/2" | 0.188" | -0.002" to 0" | 0.198" | -0.003" to 0.003" | 3,300 | Tapered | 25 | 000000000 | 00000 |
| 3/4" | 0.188" | -0.002" to 0" | 0.198" | -0.003" to 0.003" | 3,300 | Tapered | 25 | 000000000 | 00000 |
| 1" | 0.188" | -0.002" to 0" | 0.198" | -0.003" to 0.003" | 3,300 | Tapered | 10 | 000000000 | 0000 |
| 1 1/2" | 0.188" | -0.002" to 0" | 0.197" | -0.003" to 0.003" | 3,300 | Tapered | 10 | 000000000 | 00000 |
1/4" Dia. | |||||||||
| 3/4" | 0.25" | -0.002" to 0" | 0.263" | -0.003" to 0.003" | 5,800 | Tapered | 25 | 000000000 | 00000 |
| 1" | 0.25" | -0.002" to 0" | 0.263" | -0.003" to 0.003" | 5,800 | Tapered | 25 | 000000000 | 00000 |
| 1 1/4" | 0.25" | -0.002" to 0" | 0.263" | -0.003" to 0.003" | 5,800 | Tapered | 10 | 000000000 | 0000 |
| 1 1/2" | 0.25" | -0.002" to 0" | 0.262" | -0.003" to 0.003" | 5,800 | Tapered | 10 | 000000000 | 0000 |
5/16" Dia. | |||||||||
| 3/4" | 0.313" | -0.002" to 0" | 0.329" | -0.003" to 0.003" | 7,600 | Tapered | 10 | 000000000 | 0000 |
| 1" | 0.313" | -0.002" to 0" | 0.329" | -0.003" to 0.003" | 7,600 | Tapered | 10 | 000000000 | 0000 |
| 1 1/4" | 0.313" | -0.002" to 0" | 0.329" | -0.003" to 0.003" | 7,600 | Tapered | 10 | 000000000 | 0000 |
3/8" Dia. | |||||||||
| 1" | 0.375" | -0.002" to 0" | 0.394" | -0.003" to 0.003" | 11,000 | Tapered | 10 | 000000000 | 00000 |
| Lg. | Dia. (A) | Dia. (A) Tolerance | Dia. (B) | Dia. (B) Tolerance | Breaking Strength | Groove Style | Pkg. Qty. | Pkg. | |
3/32" Dia. | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/4" | 0.094" | -0.002" to 0" | 0.101" | -0.003" to 0.003" | Not Rated | Tapered | 10 | 000000000 | 00000 |
| 1/2" | 0.094" | -0.002" to 0" | 0.101" | -0.003" to 0.003" | Not Rated | Tapered | 10 | 000000000 | 0000 |
1/8" Dia. | |||||||||
| 1/2" | 0.125" | -0.002" to 0" | 0.134" | -0.003" to 0.003" | Not Rated | Tapered | 10 | 000000000 | 0000 |
| 3/4" | 0.125" | -0.002" to 0" | 0.134" | -0.003" to 0.003" | Not Rated | Tapered | 10 | 000000000 | 00000 |
| 1" | 0.125" | -0.002" to 0" | 0.133" | -0.003" to 0.003" | Not Rated | Tapered | 10 | 000000000 | 00000 |
5/32" Dia. | |||||||||
| 1/2" | 0.156" | -0.002" to 0" | 0.166" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 00000 |
| 3/4" | 0.156" | -0.002" to 0" | 0.166" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 00000 |
| 1" | 0.156" | -0.002" to 0" | 0.165" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 00000 |
3/16" Dia. | |||||||||
| 1/2" | 0.188" | -0.002" to 0" | 0.198" | -0.003" to 0.003" | Not Rated | Tapered | 10 | 000000000 | 00000 |
| 3/4" | 0.188" | -0.002" to 0" | 0.198" | -0.003" to 0.003" | Not Rated | Tapered | 10 | 000000000 | 00000 |
| 1" | 0.188" | -0.002" to 0" | 0.198" | -0.003" to 0.003" | Not Rated | Tapered | 10 | 000000000 | 00000 |
| 1 1/2" | 0.188" | -0.002" to 0" | 0.197" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 0000 |
1/4" Dia. | |||||||||
| 3/4" | 0.25" | -0.002" to 0" | 0.263" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 0000 |
| 1" | 0.25" | -0.002" to 0" | 0.263" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 0000 |
| 1 1/4" | 0.25" | -0.002" to 0" | 0.263" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 0000 |
| 1 1/2" | 0.25" | -0.002" to 0" | 0.262" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 00000 |
5/16" Dia. | |||||||||
| 1" | 0.313" | -0.002" to 0" | 0.329" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 00000 |
| 1 1/4" | 0.313" | -0.002" to 0" | 0.329" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 00000 |
3/8" Dia. | |||||||||
| 1" | 0.375" | -0.002" to 0" | 0.394" | -0.003" to 0.003" | Not Rated | Tapered | 5 | 000000000 | 0000 |
| Lg., mm | Dia. (A), mm | Dia. (A) Tolerance, mm | Dia. (B), mm | Dia. (B) Tolerance, mm | Breaking Strength, lbs. | Groove Style | Specifications Met | Pkg. Qty. | Pkg. | |
2 mm Dia. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 14 | 2 | -0.025 to 0 | 2.15 | 0 to 0.05 | 600 | Parallel | ISO 8740 | 10 | 00000000 | 00000 |
| 14 | 2 | -0.025 to 0 | 2.15 | 0 to 0.05 | 600 | Tapered | ISO 8744 | 10 | 00000000 | 0000 |
| 16 | 2 | -0.025 to 0 | 2.15 | 0 to 0.05 | 600 | Parallel | ISO 8740 | 10 | 00000000 | 0000 |
2.5 mm Dia. | ||||||||||
| 12 | 2.5 | -0.025 to 0 | 2.7 | -0.05 to 0.05 | 950 | Tapered | ISO 8744 | 10 | 00000000 | 0000 |
| 18 | 2.5 | -0.025 to 0 | 2.65 | -0.05 to 0.05 | 950 | Tapered | ISO 8744 | 10 | 00000000 | 0000 |
| 20 | 2.5 | -0.025 to 0 | 2.65 | -0.05 to 0.05 | 950 | Tapered | ISO 8744 | 10 | 00000000 | 0000 |
3 mm Dia. | ||||||||||
| 12 | 3 | -0.025 to 0 | 3.2 | -0.05 to 0.05 | 1,400 | Parallel | ISO 8740 | 10 | 00000000 | 0000 |
| 12 | 3 | -0.025 to 0 | 3.3 | -0.05 to 0.05 | 1,400 | Tapered | ISO 8744 | 10 | 00000000 | 0000 |
4 mm Dia. | ||||||||||
| 10 | 4 | -0.075 to 0 | 4.3 | -0.05 to 0.05 | 1,400 | Tapered | ISO 8744 | 10 | 00000000 | 0000 |
| 18 | 4 | -0.075 to 0 | 4.35 | -0.05 to 0.05 | 1,400 | Tapered | ISO 8744 | 10 | 00000000 | 0000 |
| 20 | 4 | -0.075 to 0 | 4.25 | -0.05 to 0.05 | 2,500 | Parallel | ISO 8740 | 10 | 00000000 | 0000 |
| 26 | 4 | -0.075 to 0 | 4.25 | -0.05 to 0.05 | 2,500 | Parallel | ISO 8740 | 10 | 00000000 | 0000 |
| 30 | 4 | -0.075 to 0 | 4.25 | -0.05 to 0.05 | 2,500 | Parallel | ISO 8740 | 10 | 00000000 | 0000 |
5 mm Dia. | ||||||||||
| 16 | 5 | -0.075 to 0 | 5.25 | -0.05 to 0.05 | 3,900 | Parallel | ISO 8740 | 10 | 00000000 | 0000 |
| 45 | 5 | -0.075 to 0 | 5.25 | -0.05 to 0.05 | 3,900 | Tapered | ISO 8744 | 10 | 00000000 | 00000 |
6 mm Dia. | ||||||||||
| 20 | 6 | -0.075 to 0 | 6.3 | -0.05 to 0.05 | 5,700 | Parallel | ISO 8740 | 10 | 00000000 | 00000 |