Filter by
Material
Tolerance Rating
Container Type
Container Features
Export Control Classification Number (ECCN)
DFARS Specialty Metals
Undersized Machine Key Assortments
Since they fit more loosely than standard keys, these undersized keys are best for uneven keyways or when you need to disassemble parts frequently, such as during maintenance or prototyping. Made of steel, all keys offer good strength.
Rounded keys fill oval keyways completely, reducing stress on the key and shaft. In closed keyways, these keys won’t slide along the shaft. Their rounded ends also make it easy to slide gears, hubs, and other components into place.
Zinc-plated keys resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Straight Key Assortments
Straight Key
| Number of Pieces | Straight Keys Included | Key Tolerance | Container Type | Each | |
1008-1045 Carbon Steel | |||||
|---|---|---|---|---|---|
| 58 | 4 mm × 4 mm × 25 mm Lg. (12 Pieces) 5 mm × 5 mm × 20 mm Lg. (12 Pieces) 5 mm × 5 mm × 25 mm Lg. (12 Pieces) 6 mm × 6 mm × 20 mm Lg. (8 Pieces) 7 mm × 8 mm × 20 mm Lg. (8 Pieces) 7 mm × 8 mm × 32 mm Lg. (6 Pieces) | -0.09mm to 0mm | Plastic Box | 0000000 | 000000 |
Zinc-Plated 1008-1045 Carbon Steel | |||||
| 58 | 1/8" × 1/8" × 3/4" Lg. (3 Pieces) 1/8" × 1/8" × 1" Lg. (3 Pieces) 3/16" × 3/16" × 3/4" Lg. (5 Pieces) 3/16" × 3/16" × 1" Lg. (5 Pieces) 3/16" × 3/16" × 1 1/4" Lg. (5 Pieces) 1/4" × 1/4" × 3/4" Lg. (5 Pieces) 1/4" × 1/4" × 1 1/4" Lg. (5 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (5 Pieces) 5/16" × 5/16" × 1 1/4" Lg. (5 Pieces) 5/16" × 5/16" × 1 1/2" Lg. (5 Pieces) 3/8" × 3/8" × 1 1/4" Lg. (5 Pieces) 3/8" × 3/8" × 1 1/2" Lg. (5 Pieces) 1/2" × 1/2" × 1 1/2" Lg. (2 Pieces) | -0.003" to 0" | Plastic Box | 000000000 | 000000 |
Zinc-Plated Steel | |||||
| 300 | 1/8" × 1/8" × 3/4" Lg. (25 Pieces) 1/8" × 1/8" × 1" Lg. (25 Pieces) 3/16" × 3/16" × 3/4" Lg. (25 Pieces) 3/16" × 3/16" × 1" Lg. (25 Pieces) 3/16" × 3/16" × 1-1/4" Lg. (25 Pieces) 3/16" × 3/16" × 1-1/2" Lg. (25 Pieces) 1/4" × 1/4" × 3/4" Lg. (25 Pieces) 1/4" × 1/4" × 1-1/4" Lg. (25 Pieces) 1/4" × 1/4" × 1" Lg. (25 Pieces) 1/4" × 1/4" × 1-1/2" Lg. (25 Pieces) 5/16" × 5/16" × 1-1/4" Lg. (25 Pieces) 5/16" × 5/16" × 1-1/2" Lg. (25 Pieces) | -0.002" to 0" | Plastic Box | 000000000 | 000000 |
Rounded Key Assortments
Rounded Key
| Number of Pieces | Rounded Keys Included | Key Tolerance | Container Type | Each | |
1008-1045 Carbon Steel | |||||
|---|---|---|---|---|---|
| 25 | 1/8" × 1/8" × 3/4" Lg. (2 Pieces) 1/8" × 1/8" × 1" Lg. (3 Pieces) 3/16" × 3/16" × 3/4" Lg. (3 Pieces) 3/16" × 3/16" × 1" Lg. (3 Pieces) 3/16" × 3/16" × 1 1/2" Lg. (2 Pieces) 1/4" × 1/4" × 3/4" Lg. (2 Pieces) 1/4" × 1/4" × 1" Lg. (3 Pieces) 1/4" × 1/4" × 1 1/4" Lg. (2 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (1 Piece) 5/16" × 5/16" × 1" Lg. (1 Piece) 5/16" × 5/16" × 1 1/2" Lg. (1 Piece) 3/8" × 3/8" × 1" Lg. (1 Piece) 3/8" × 3/8" × 1 1/2" Lg. (1 Piece) | -0.002" to 0" | __ | 0000000 | 000000 |
| 58 | 3/16" × 3/16" × 3/4" Lg. (9 Pieces) 3/16" × 3/16" × 1" Lg. (9 Pieces) 1/4" × 1/4" × 3/4" Lg. (8 Pieces) 1/4" × 1/4" × 1" Lg. (7 Pieces) 1/4" × 1/4" × 1 1/4" Lg. (7 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (6 Pieces) 5/16" × 5/16" × 1" Lg. (3 Pieces) 5/16" × 5/16" × 1 1/2" Lg. (3 Pieces) 3/8" × 3/8" × 1" Lg. (3 Pieces) 3/8" × 3/8" × 1 1/2" Lg. (3 Pieces) | -0.002" to 0" | Plastic Box | 0000000 | 00000 |
Zinc-Plated Steel | |||||
| 25 | 4 mm × 4 mm × 80 mm Lg. (2 Pieces) 5 mm × 5 mm × 80 mm Lg. (3 Pieces) 6 mm × 6 mm × 80 mm Lg. (2 Pieces) 7 mm × 7 mm × 80 mm Lg. (2 Pieces) 8 mm × 7 mm × 80 mm Lg. (2 Pieces) 8 mm × 8 mm × 80 mm Lg. (3 Pieces) 10 mm × 8 mm × 80 mm Lg. (2 Pieces) 10 mm × 10 mm × 80 mm Lg. (2 Pieces) 12 mm × 8 mm × 80 mm Lg. (2 Pieces) 12 mm × 12 mm × 80 mm Lg. (2 Pieces) 16 mm × 10 mm × 80 mm Lg. (1 Piece) 18 mm × 11 mm × 80 mm Lg. (1 Piece) 20 mm × 12 mm × 80 mm Lg. (1 Piece) | -0.03mm to 0mm | Plastic Box | 000000000 | 000000 |
| 58 | 4 mm × 4 mm × 40 mm Lg. (8 Pieces) 5 mm × 5 mm × 40 mm Lg. (8 Pieces) 6 mm × 6 mm × 40 mm Lg. (10 Pieces) 8 mm × 7 mm × 40 mm Lg. (4 Pieces) 8 mm × 8 mm × 40 mm Lg. (10 Pieces) 10 mm × 8 mm × 40 mm Lg. (4 Pieces) 10 mm × 10 mm × 40 mm Lg. (4 Pieces) 12 mm × 12 mm × 40 mm Lg. (4 Pieces) 14 mm × 9 mm × 40 mm Lg. (4 Pieces) 16 mm × 10 mm × 40 mm Lg. (2 Pieces) | -0.03mm to 0mm | Plastic Box | 000000000 | 00000 |
Oversized Key Stock Assortments
Make a key that is the exact length you need. Because this key stock is slightly larger than standard key stock, keys will fit tightly in worn keyways.
Zinc-plated steel key stock resists corrosion in wet environments.
18-8 stainless steel key stock is chemical resistant and may be mildly magnetic.
| Number of Pieces | Straight Keys Included | Key Tolerance | Container Type | Each | |
Zinc-Plated 1008-1045 Carbon Steel | |||||
|---|---|---|---|---|---|
| 7 | 1/8" × 1/8" × 12" Lg. (1 Piece) 3/16" × 3/16" × 12" Lg. (1 Piece) 3/16" × 1/4" × 12" Lg. (1 Piece) 1/4" × 5/16" × 12" Lg. (1 Piece) 5/16" × 3/8" × 12" Lg. (1 Piece) 3/8" × 7/16" × 12" Lg. (1 Piece) 7/16" × 1/2" × 12" Lg. (1 Piece) | 0" to 0.003" | Cardboard Box | 000000000 | 000000 |
| 31 | 1/8" × 1/8" × 12" Lg. (5 Pieces) 3/16" × 3/16" × 12" Lg. (5 Pieces) 1/4" × 1/4" × 12" Lg. (5 Pieces) 5/16" × 5/16" × 12" Lg. (5 Pieces) 3/8" × 3/8" × 12" Lg. (5 Pieces) 7/16" × 7/16" × 12" Lg. (3 Pieces) 1/2" × 1/2" × 12" Lg. (3 Pieces) | 0" to 0.003" | Cardboard Box | 000000000 | 000000 |
| 31 | 4 mm × 4 mm × 305 mm Lg. (5 Pieces) 5 mm × 5 mm × 305 mm Lg. (5 Pieces) 6 mm × 6 mm × 305 mm Lg. (5 Pieces) 7 mm × 7 mm × 305 mm Lg. (5 Pieces) 8 mm × 8 mm × 305 mm Lg. (5 Pieces) 10 mm × 10 mm × 305 mm Lg. (3 Pieces) 12 mm × 12 mm × 305 mm Lg. (3 Pieces) | 0mm to 0.076mm | Cardboard Box | 000000000 | 00000 |
18-8 Stainless Steel  | |||||
| 7 | 1/8" × 1/8" × 12" Lg. (1 Piece) 3/16" × 3/16" × 12" Lg. (1 Piece) 1/4" × 1/4" × 12" Lg. (1 Piece) 5/16" × 5/16" × 12" Lg. (1 Piece) 3/8" × 3/8" × 12" Lg. (1 Piece) 7/16" × 7/16" × 12" Lg. (1 Piece) 1/2" × 1/2" × 12" Lg. (1 Piece) | 0" to 0.003" | Cardboard Tube | 000000000 | 00000 |
| 31 | 1/8" × 1/8" × 12" Lg. (5 Pieces) 3/16" × 3/16" × 12" Lg. (5 Pieces) 1/4" × 1/4" × 12" Lg. (5 Pieces) 5/16" × 5/16" × 12" Lg. (5 Pieces) 3/8" × 3/8" × 12" Lg. (5 Pieces) 7/16" × 7/16" × 12" Lg. (3 Pieces) 1/2" × 1/2" × 12" Lg. (3 Pieces) | 0" to 0.003" | Cardboard Box | 000000000 | 000000 |
| 31 | 4 mm × 4 mm × 305 mm Lg. (5 Pieces) 5 mm × 5 mm × 305 mm Lg. (5 Pieces) 6 mm × 6 mm × 305 mm Lg. (5 Pieces) 7 mm × 7 mm × 305 mm Lg. (5 Pieces) 8 mm × 8 mm × 305 mm Lg. (5 Pieces) 10 mm × 10 mm × 305 mm Lg. (3 Pieces) 12 mm × 12 mm × 305 mm Lg. (3 Pieces) | 0mm to 0.076mm | Cardboard Box | 000000000 | 000000 |
Oversized Machine Key Assortments
Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways.
| Number of Pieces | Straight Keys Included | Key Tolerance | Container Type | Each | |
1008-1045 Carbon Steel | |||||
|---|---|---|---|---|---|
| 25 | 1/8" × 1/8" × 1/2" Lg. (5 Pieces) 1/8" × 1/8" × 1" Lg. (5 Pieces) 3/16" × 3/16" × 3/4" Lg. (3 Pieces) 3/16" × 3/16" × 1" Lg. (3 Pieces) 3/16" × 3/16" × 1 1/2" Lg. (1 Piece) 1/4" × 1/4" × 1" Lg. (2 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (2 Pieces) 3/8" × 3/8" × 1" Lg. (2 Pieces) 3/8" × 3/8" × 1 1/4" Lg. (1 Piece) 1/2" × 1/2" × 1 1/2" Lg. (1 Piece) | 0" to 0.002" | Plastic Box | 000000000 | 000000 |
| 25 | 4 mm × 4 mm × 86 mm Lg. (2 Pieces) 5 mm × 5 mm × 86 mm Lg. (2 Pieces) 6 mm × 6 mm × 86 mm Lg. (3 Pieces) 7 mm × 7 mm × 86 mm Lg. (2 Pieces) 7 mm × 8 mm × 86 mm Lg. (2 Pieces) 8 mm × 8 mm × 86 mm Lg. (3 Pieces) 8 mm × 10 mm × 86 mm Lg. (2 Pieces) 8 mm × 12 mm × 86 mm Lg. (2 Pieces) 10 mm × 10 mm × 86 mm Lg. (2 Pieces) 10 mm × 16 mm × 86 mm Lg. (1 Piece) 11 mm × 18 mm × 86 mm Lg. (1 Piece) 12 mm × 12 mm × 86 mm Lg. (2 Pieces) 12 mm × 20 mm × 86 mm Lg. (1 Piece) | 0mm to 0.076mm | Plastic Box | 000000000 | 00000 |
Standard Key Stock Assortments
These assortments include various sizes of key stock—choose a piece and cut it to your desired length.
Zinc-plated assortments resist corrosion in wet environments.
Gold-dichromate plated assortments make it easy to read the sizing on each piece.
| Number of Pieces | Straight Keys Included | Container Type | Key Tolerance | Each | |
Zinc-Plated 1008-1045 Carbon Steel | |||||
|---|---|---|---|---|---|
| 16 | 1/4" × 3/8" × 12" Lg. (2 Pieces) 1/4" × 1/2" × 12" Lg. (2 Pieces) 5/16" × 3/8" × 12" Lg. (2 Pieces) 5/16" × 1/2" × 12" Lg. (2 Pieces) 3/8" × 1/2" × 12" Lg. (2 Pieces) 1/2" × 3/4" × 12" Lg. (2 Pieces) 1/2" × 5/8" × 12" Lg. (2 Pieces) 5/8" × 3/4" × 12" Lg. (2 Pieces) | Cardboard Box | -0.002" to 0.004" | 0000000 | 0000000 |
Gold-Dichromate Plated Steel | |||||
| 32 | 4 mm × 4 mm × 305 mm Lg. (6 Pieces) 5 mm × 5 mm × 305 mm Lg. (6 Pieces) 6 mm × 6 mm × 305 mm Lg. (6 Pieces) 8 mm × 8 mm × 305 mm Lg. (6 Pieces) 10 mm × 10 mm × 305 mm Lg. (4 Pieces) 12 mm × 12 mm × 305 mm Lg. (4 Pieces) | Cardboard Box | -0.03mm to 0.03mm | 00000000 | 000000 |
Undersized Key Stock Assortments
Cut keys to custom lengths. This key stock is undersized, so keys will fit slightly more loosely than standard keys and are best for inconsistent keyways. Use undersized keys when parts need to be taken apart frequently, such as for maintenance or prototyping. Either zinc- or zinc yellow-chromate plated, this key stock resists corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Number of Pieces | Straight Keys Included | Key Tolerance | Container Type | Each | |
Zinc-Plated 1008-1045 Carbon Steel | |||||
|---|---|---|---|---|---|
| 31 | 1/8" × 1/8" × 12" Lg. (5 Pieces) 3/16" × 3/16" × 12" Lg. (5 Pieces) 1/4" × 1/4" × 12" Lg. (5 Pieces) 5/16" × 5/16" × 12" Lg. (5 Pieces) 3/8" × 3/8" × 12" Lg. (5 Pieces) 7/16" × 7/16" × 12" Lg. (3 Pieces) 1/2" × 1/2" × 12" Lg. (3 Pieces) | -0.002" to 0" | Cardboard Box | 0000000 | 000000 |
Zinc Yellow-Chromate Plated 1008-1045 Carbon Steel | |||||
| 31 | 4 mm × 4 mm × 305 mm Lg. (5 Pieces) 5 mm × 5 mm × 305 mm Lg. (5 Pieces) 6 mm × 6 mm × 305 mm Lg. (5 Pieces) 7 mm × 7 mm × 305 mm Lg. (5 Pieces) 8 mm × 8 mm × 305 mm Lg. (5 Pieces) 10 mm × 10 mm × 305 mm Lg. (3 Pieces) 12 mm × 12 mm × 305 mm Lg. (3 Pieces) | -0.043mm to 0mm | Cardboard Box | 0000000 | 00000 |
Woodruff Key Assortments
A rounded bottom allows these keys to rock in their seat to relieve stress on the shaft caused by vibration or misalignment.
Zinc- and zinc yellow-chromate plated steel keys resist corrosion in wet environments.
316 stainless steel keys have excellent chemical and corrosion resistance. However, they’re not as strong as steel keys.
| Number of Pieces | Woodruff Keys Included | Container Type | Each | |
1008-1045 Carbon Steel | ||||
|---|---|---|---|---|
| 30 | Key Number 3 (10 each) Key Number 6 (8 Each) Key Numbers A, 9, and 15 (4 Each) | Plastic Box | 000000000 | 000000 |
| 97 | Key Numbers 1, 2, 4, 5, 16, 19, 12, 14, 17, 20, 21, 22, 24, D, 23, E, 26, 27, 28, and 29 (1 Each) Key Numbers 3, 7, 6, 8, and 91 (4 Each) Key Number 9 (12 Each) Key Numbers 10, 13, 15, B, and 152 (3 Each) Key Numbers 11 and A (10 Each) Key Numbers 18 and G (5 Each) | Plastic Box | 000000000 | 000000 |
| 225 | Key Numbers 11, 13, and A (10 Each) Key Numbers 15, 18, and E (5 Each) Key Numbers 211, 212, 213, 1, 2, 3, 5, 7, 6, 61, 9, and 91 (15 Each) | Plastic Box | 000000000 | 000000 |
| 350 | Key Size 1.5 mm × 2.6 mm (25 Each) Key Size 2 mm × 2.6 mm (25 Each) Key Size 2 mm × 5 mm (25 Each) Key Size 2.5 mm × 3.7 mm (25 Each) Key Size 3 mm × 3.7 mm (25 Each) Key Size 3 mm × 6.5 mm (25 Each) Key Size 4 mm × 5 mm (25 Each) Key Size 4 mm × 7.5 mm (25 Each) Key Size 5 mm × 7.5 mm (20 Each) Key Size 5 mm × 9 mm (20 Each) Key Size 5 mm × 10 mm (15 Each) Key Size 6 mm × 7.5 mm (15 Each) Key Size 6 mm × 9 mm (15 Each) Key Size 6 mm × 11 mm (15 Each) Key Size 8 mm × 11 mm (15 Each) Key Size 8 mm × 13 mm (15 Each) Key Size 10 mm × 13 mm (10 Each) Key Size 10 mm × 16 mm (10 Each) | Plastic Box | 000000000 | 000000 |
Zinc-Plated 1008-1045 Carbon Steel | ||||
| 250 | Key Numbers 1, 4, 8, 211, 213 (10 Each) Key Numbers 2, 3, 7, 9, 212 (20 Each) Key Number 5 (30 each) Key Number 6 (40 Each) Key Numbers A, 10, 11, 12, 61, 91 (5 Each) | Plastic Box | 000000000 | 00000 |
Zinc Yellow-Chromate Plated 1008-1045 Carbon Steel | ||||
| 70 | Key Size 2 mm × 3.7 mm (5 Each) Key Size 3 mm × 3.7 mm (8 Each) Key Size 3 mm × 5 mm (8 Each) Key Size 4 mm × 5 mm (6 Each) Key Size 4 mm × 6.5 mm (6 Each) Key Size 5 mm × 6.5 mm (4 Each) Key Size 5 mm × 7.5 mm (6 Each) Key Size 5 mm × 9 mm (6 Each) Key Size 6 mm × 9 mm (8 Each) Key Size 6 mm × 11 mm (4 Each) Key Size 8 mm × 11 mm (5 Each) Key Size 8 mm × 13 mm (4 Each) | Plastic Box | 000000000 | 000000 |
316 Stainless Steel | ||||
| 66 | Key Numbers 1, 2, 3, 211, 212, 213 (5 Each) Key Numbers 5, 6, 7, 8, 9, 61, 91 (4 Each) Key Numbers 11, A (3 Each) Key Number 15 (2 Each) | Plastic Box | 000000000 | 000000 |
Step Key Assortments
For Gears
For Shafts
For Gears
For Shafts
Also known as offset key stock, use step keys to repair keyways in gears and shafts. Made from zinc-plated steel, they resist corrosion in wet environments.
| Number of Pieces | Step Keys for Gears Included | Step Keys for Shafts Included | Tolerance Rating | Container Type | Each | |
Zinc-Plated 1018-1045 Carbon Steel | ||||||
|---|---|---|---|---|---|---|
| 7 | 3/16" (A) × 3/32" (B) × 1/8" (C) × 1/16" (D) × 5/32" Ht. × 12" Lg. (1 Piece) 3/8" (A) × 3/16" (B) × 5/16" (C) × 5/32" (D) × 11/32" Ht. × 12" Lg. (1 Piece) | 3/16" (A) × 3/32" (B) 1/4" (C) × 1/8" (D) × 7/32" Ht. × 12" Lg. (1 Piece) 1/4" (A) × 1/8" (B) 5/16" (C) × 1/8" (D) × 1/4" Ht. × 12" Lg. (1 Piece) 1/4" (A) × 1/8" (B) 3/8" (C) × 3/16" (D) × 5/16" Ht. × 12" Lg. (1 Piece) 3/8" (A) × 3/16" (B) 1/2" (C) × 1/4" (D) × 7/16 Ht. × 12" Lg. (1 Piece) 1/2" (A) × 1/4" (B) 5/8" (C) × 5/16" (D) × 9/16" Ht. × 12" Lg. (1 Piece) | Oversized | Cardboard Box | 000000000 | 000000 |
Machine Key and Woodruff Key Assortments
 |  Straight Key |
 Woodruff Key |
| Number of Pieces | Straight Keys Included | Woodruff Keys Included | Container Type | Each | |
1018-1045 Carbon Steel | |||||
|---|---|---|---|---|---|
| 401 | 1/8" × 1/8" × 1 1/2" Lg. (50 Pieces) 3/16" × 1/4" × 1 1/2" Lg. (25 Pieces) 3/16" × 3/16" × 1 1/2" Lg. (30 Pieces) 1/4" × 1/4" × 1 1/2" Lg. (18 Pieces) 5/16" × 5/16" × 1 1/2" Lg. (15 Pieces) 3/8" × 3/8" × 1 1/2" Lg. (15 Pieces) | Key Numbers 3 and 5 (45 Each) Key Numbers 6 and 7 (22 Each) Key Number 9 (30 Each) Key Numbers 10 and A (15 Each) Key Number 13 (12 Each) Key Number 15 (20 Each) Key Numbers C and 21 (9 Each) Key Number G (4 Each) | Plastic Box | 000000000 | 0000000 |