Standard Groove Pins
Why choose standard Groove Pins?
If you need standard pins quickly, Driv-Lok is the place to go. DRIV-LOK offers grooved dowel pins with a wide range of diameters, lengths, end configurations, and proper press-fit to lock the fastener in place. We know that customers must be flexible and respond to their demanding environments to succeed. That’s why we have partnered with Stocking Distributors, who immediately deliver standard groove pins to our customers.
Grooved dowel pins are typically zinc-plated and manufactured from unhardened, low-carbon steel. However, we also offer a wide range of finishes and heat treatments for applications that require shear resistance.
The Types of Grooved Pins
Standard Groove pins are listed below, and we can also customize: See More
Type A
The Type A Pin has three full-length tapered grooves. This popular type of pin is used in applications requiring excellent locking effect and ease of assembly and is widely used in place of taper pins, rivets, set screws, and keys. Typical applications include keying sprockets, gears, collars, knobs, handles, levers, and wheels to shafts.
Type C
The Type C Pin has three parallel grooves extending one-quarter of its overall length, making it ideally suited for linkage or pivot applications, especially where a relatively short locking section and longer free length are required. This pin is widely used in certain hinge applications because the long lead permits easy insertion.
Type E
Type E has three parallel half-length grooves located equidistant from each end, and is widely used as a T handle on valves and tools. It is also used as a cross pin, cotter pin, or pivot pin where center locking is required.
Type G
Type G has three parallel half-length grooves including the pilot. It is a very versatile pin, suitable for use in both blind and through holes as a spring anchor pin. The annular groove opposite the locking end is used to anchor the end loop of a tension spring. If snap or retainer rings are to be used, special section annular grooves can be machined to order.
Type H
Type H has three parallel grooves for half the pin’s length. This type of pin may be used as a pivot, stop, or hinge pin. When pressed in place, the grooved portion locks in one part while the ungrooved section remains free to serve as the locator hinge.
Type U
Type U has three parallel grooves extending the full length of the pin, and a short pilot at each end permits hopper or automatic feeding. Identical ends speed manual insertion because the operator does not need to examine the pin to determine the proper end to start. Full-length parallel grooves provide the maximum locking effect. Typical applications for Type U include keying gears, collars, knobs, handles, shafts, and more.
Standard Grooved Pin Dimensions
| Dimension | 1⁄16 | 3⁄32 | 1⁄8 | 5⁄32 | 3⁄16 | 7⁄32 | 1⁄4 | 5⁄16 | 3⁄8 | 7⁄16 | 1⁄2 |
| Nominal Diameter | |||||||||||
| Max. | .0625 | .0938 | .1250 | .1563 | .1875 | .2188 | .2500 | .3125 | .3750 | .4375 | .5000 |
| Min. | .0610 | .0923 | .1230 | .1543 | .1855 | .2168 | .2480 | .3105 | .3730 | .4355 | .4980 |
| Crown Height "E" | .0065 | .0091 | .0130 | .0170 | .0180 | .0220 | .0260 | .0340 | .0390 | .0470 | .0520 |
| Crown Radius "R" ±.010 | 5⁄64 | 1⁄8 | 5⁄32 | 3⁄16 | 1⁄4 | 9⁄32 | 5⁄16 | 3⁄8 | 15⁄32 | 17⁄32 | 5⁄8 |
| Pilot Length "P" (Ref.) | 1⁄32 | 1⁄32 | 1⁄32 | 1⁄16 | 1⁄16 | 1⁄16 | 1⁄16 | 3⁄32 | 3⁄32 | 3⁄32 | 3⁄32 |
| Chamfer Length "C" min. | .005 | .005 | .005 | .005 | .016 | .016 | .016 | .031 | .031 | .031 | .031 |
| Chamfer Angle "A" ±5° | 35° | 35° | 35° | 35° | 35° | 35° | 35° | 35° | 35° | 35° | 35° |
| Neck Radius "M" (Ref.) | --- | 1⁄64 | 1⁄32 | 1⁄32 | 1⁄32 | 3⁄64 | 3⁄64 | 1⁄16 | 1⁄16 | 3⁄32 | 3⁄32 |
| Neck Width "G" ±.005 | --- | .033 | .064 | .064 | .064 | .096 | .096 | .127 | .127 | .190 | .190 |
| Neck Diameter "K" ±.005 | --- | .062 | .083 | .104 | .125 | .146 | .167 | .209 | .250 | .293 | .312 |
| Shoulder Width "S" +.010/-.000 | --- | 1⁄32 | 1⁄32 | 3⁄64 | 3⁄64 | 1⁄16 | 1⁄16 | 3⁄32 | 1⁄8 | 1⁄8 | t |
| Lengths* "L" ±.010 | 1⁄4 to 1 | 1⁄4 to 1 1⁄4 | 1⁄4 to 1 1⁄2 | 3⁄8 to 2 | 3⁄8 to 2 | 1⁄2 to 2 1⁄4 | 1⁄2 to 2 3⁄4 | 5⁄8 to 2 3⁄4 | 3⁄4 to 3 1⁄2 | 7⁄8 to 3 1⁄2 | 1 to 3 1⁄2 |
Standard Expanded Diameters
Note that expanded diameters cannot be accurately measured using a micrometer. To accurately measure expanded diameters of grooved pins, use a class Z ring gauge.
Nominal Diameter
| 1⁄16 | 3⁄32 | 1⁄8 | 5⁄32 | 3⁄16 | 7⁄32 | 1⁄4 | 5⁄16 | 3⁄8 | 7⁄16 | 1⁄2 |
Expanded Diameter
| Groove Length | ±.0015 | ±.002 | ±.0025 | ±.003 | |||||||
| 1⁄8 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | |||
| 3⁄16 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | |||
| 1⁄4 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | |||
| 5⁄16 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 3⁄8 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 7⁄16 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 1⁄2 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 9⁄16 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 5⁄8 | .068 | .101 | .134 | .166 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 3⁄4 | .067 | .100 | .134 | .166 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 7⁄8 | .067 | .100 | .133 | .165 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 1 | .067 | .100 | .133 | .165 | .198 | .230 | .263 | .329 | .394 | .459 | .525 |
| 1 1⁄4 | .100 | .132 | .164 | .197 | .230 | .263 | .329 | .394 | .459 | .525 | |
| 1 1⁄2 | .132 | .164 | .197 | .229 | .262 | .329 | .394 | .459 | .525 | ||
| 1 3⁄4 | .163 | .197 | .229 | .262 | .328 | .393 | .459 | .525 | |||
| 2 | .163 | .196 | .229 | .262 | .328 | .393 | .458 | .525 | |||
| 2 1⁄4 | .229 | .262 | .328 | .393 | .458 | .524 | |||||
| 2 1⁄2 | .261 | .327 | .393 | .458 | .524 | ||||||
| 2 3⁄4 | .261 | .327 | .393 | .458 | .524 | ||||||
| 3 | .392 | .457 | .523 | ||||||||
| 3 1⁄4 | .392 | .457 | .523 | ||||||||
| 3 1⁄2 | .391 | .456 | .522 |