Filter by
DFARS Compliance
Step Machine Key Stock
When a keyway is damaged, cut a new, wider one. This key stock is stepped to match repaired keyways in shafts or gears. Cut it to length to create the machine key you need.
Steel key stock is an economical choice with good strength. 18-8 stainless steel key stock offers a balance of strength and corrosion resistance. It may be mildly magnetic.
Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway. Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway.
For technical drawings and 3-D models, click on a part number.
Key Stock for Gears
For Gears
For Gears
For Hub Keyway | For Shaft Keyway | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Wd. (A) | Ht. (B) | Wd. (A) Tolerance | Wd. (C) | Ht. (D) | Wd. (C) Tolerance | Ht. | Tolerance Rating | Ht. Tolerance | Each | |
1018-1045 Carbon Steel | ||||||||||
12" Lg. | ||||||||||
| 3/16" | 3/32" | 0.000" to 0.002" | 1/8" | 1/16" | 0.000" to 0.002" | 5/32" | Oversized | -0.015" to 0.015" | 00000000 | 000000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | 1/8" | 0.000" to 0.002" | 5/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | 5/32" | 0.000" to 0.002" | 11/32" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 5/8" | 5/16" | 0.000" to 0.002" | 11/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
Zinc-Plated 1018-1045 Carbon Steel | ||||||||||
12" Lg. | ||||||||||
| 3/16" | 3/32" | 0.000" to 0.002" | 1/8" | 1/16" | 0.000" to 0.002" | 5/32" | Standard | -0.015" to 0.015" | 000000000 | 00000 |
| 3/16" | 3/32" | 0.000" to 0.002" | 1/8" | 1/16" | 0.000" to 0.002" | 5/32" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | 1/8" | 0.000" to 0.002" | 5/16" | Standard | -0.012" to 0.014" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | 1/8" | 0.000" to 0.002" | 5/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | 5/32" | 0.000" to 0.002" | 11/32" | Standard | -0.012" to 0.014" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | 5/32" | 0.000" to 0.002" | 11/32" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 7/16" | 5/32" | 0.000" to 0.002" | 13/32" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 7/16" | 5/32" | 0.000" to 0.002" | 13/32" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 5/8" | 5/16" | 0.000" to 0.002" | 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 5/8" | 5/16" | 0.000" to 0.002" | 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 1/2" | 1/4" | 0.000" to 0.002" | 5/8" | Standard | -0.014" to 0.015" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 1/2" | 1/4" | 0.000" to 0.002" | 5/8" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 5/8" | 3/16" | 0.000" to 0.002" | 9/16" | Standard | -0.014" to 0.015" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 5/8" | 3/16" | 0.000" to 0.002" | 9/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 5/8" | 5/16" | 0.000" to 0.002" | 11/16" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 5/8" | 5/16" | 0.000" to 0.002" | 11/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 1" | 1/2" | 0.000" to 0.002" | 7/8" | 7/16" | 0.000" to 0.002" | 15/16" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 1" | 1/2" | 0.000" to 0.002" | 7/8" | 7/16" | 0.000" to 0.002" | 15/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
18-8 Stainless Steel | ||||||||||
12" Lg. | ||||||||||
| 3/16" | 3/32" | 0.000" to 0.003" | 1/8" | 1/16" | 0.000" to 0.002" | 5/32" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.003" | 5/16" | 1/8" | 0.000" to 0.002" | 5/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.003" | 5/16" | 5/32" | 0.000" to 0.002" | 11/32" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.005" | 5/8" | 5/16" | 0.000" to 0.002" | 11/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
Key Stock for Shafts
For Shafts
For Shafts
For Hub Keyway | For Shaft Keyway | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Wd. (A) | Ht. (B) | Wd. (A) Tolerance | Wd. (C) | Ht. (D) | Wd. (C) Tolerance | Ht. | Tolerance Rating | Ht. Tolerance | Each | |
Zinc-Plated 1018-1045 Carbon Steel | ||||||||||
12" Lg. | ||||||||||
| 3/16" | 3/32" | 0.000" to 0.002" | 1/4" | 3/32" | 0.000" to 0.002" | 3/16" | Standard | -0.015" to 0.015" | 000000000 | 000000 |
| 3/16" | 3/32" | 0.000" to 0.002" | 1/4" | 3/32" | 0.000" to 0.002" | 3/16" | Undersized | -0.015" to 0.015" | 000000000 | 0000 |
| 3/16" | 3/32" | 0.000" to 0.002" | 1/4" | 1/8" | 0.000" to 0.002" | 7/32" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 3/16" | 3/32" | 0.000" to 0.002" | 1/4" | 1/8" | 0.000" to 0.002" | 7/32" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 5/16" | 1/8" | 0.000" to 0.002" | 1/4" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 5/16" | 1/8" | 0.000" to 0.002" | 1/4" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 3/8" | 1/8" | 0.000" to 0.002" | 1/4" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 3/8" | 1/8" | 0.000" to 0.002" | 1/4" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 7/16" | 5/32" | 0.000" to 0.002" | 11/32" | Standard | -0.012" to 0.014" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 7/16" | 5/32" | 0.000" to 0.002" | 11/32" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | 3/16" | 0.000" to 0.002" | 3/8" | Standard | -0.012" to 0.014" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | 3/16" | 0.000" to 0.002" | 3/8" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | 1/4" | 0.000" to 0.002" | 7/16" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | 1/4" | 0.000" to 0.002" | 7/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 9/16" | 3/16" | 0.000" to 0.002" | 7/16" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 5/8" | 3/16" | 0.000" to 0.002" | 7/16" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 5/8" | 3/16" | 0.000" to 0.002" | 7/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 5/8" | 5/16" | 0.000" to 0.002" | 9/16" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 5/8" | 5/16" | 0.000" to 0.002" | 9/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 11/16" | 1/4" | 0.000" to 0.002" | 1/2" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 5/8" | 5/16" | 0.000" to 0.002" | 11/16" | 1/4" | 0.000" to 0.002" | 9/16" | Standard | -0.014" to 0.014" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 7/8" | 7/16" | 0.000" to 0.002" | 13/16" | Standard | -0.014" to 0.015" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 7/8" | 7/16" | 0.000" to 0.002" | 13/16" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 1" | 1/2" | 0.000" to 0.002" | 7/8" | Standard | -0.014" to 0.015" | 000000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 1" | 1/2" | 0.000" to 0.002" | 7/8" | Undersized | -0.015" to 0.015" | 000000000 | 00000 |
1018-1045 Carbon Steel | ||||||||||
12" Lg. | ||||||||||
| 3/16" | 3/32" | 0.000" to 0.002" | 1/4" | 1/8" | 0.000" to 0.002" | 7/32" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 3/8" | 1/8" | 0.000" to 0.002" | 1/4" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 3/8" | 3/16" | 0.000" to 0.002" | 5/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 7/16" | 5/32" | 0.000" to 0.002" | 11/32" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | 3/16" | 0.000" to 0.002" | 3/8" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | 1/4" | 0.000" to 0.002" | 7/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 5/8" | 5/16" | 0.000" to 0.002" | 9/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 7/8" | 7/16" | 0.000" to 0.002" | 13/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
18-8 Stainless Steel | ||||||||||
12" Lg. | ||||||||||
| 3/16" | 3/32" | 0.000" to 0.002" | 1/4" | 3/32" | 0.000" to 0.003" | 3/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/16" | 3/32" | 0.000" to 0.002" | 1/4" | 1/8" | 0.000" to 0.003" | 7/32" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 5/16" | 1/8" | 0.000" to 0.003" | 1/4" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 3/8" | 1/8" | 0.000" to 0.003" | 1/4" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 1/4" | 1/8" | 0.000" to 0.002" | 3/8" | 3/16" | 0.000" to 0.003" | 5/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 7/16" | 5/32" | 0.000" to 0.003" | 11/32" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | 3/16" | 0.000" to 0.003" | 3/8" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/8" | 3/16" | 0.000" to 0.002" | 1/2" | 1/4" | 0.000" to 0.003" | 7/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 1/2" | 1/4" | 0.000" to 0.002" | 5/8" | 5/16" | 0.000" to 0.005" | 9/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |
| 3/4" | 3/8" | 0.000" to 0.002" | 7/8" | 7/16" | 0.000" to 0.005" | 13/16" | Oversized | -0.015" to 0.015" | 00000000 | 00000 |