Material Material |
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Tolerance Rating Tolerance Rating |
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Key Type Key Type |
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 | Straight |
Minimum Hardness Minimum Hardness |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Specifications Met Specifications Met |
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Machine Key Stock
Cut this square or rectangular key stock to length to create a straight machine key. Straight keys are the most common type of key. Machine keys are often the same material and as hard or harder than the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.
Brass key stock is corrosion resistant and nonmagnetic. Brass is softer than other metals, so it's often used for shear keys.
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. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
For technical drawings and 3-D models, click on a part number.
Tolerance | |||||||
|---|---|---|---|---|---|---|---|
| Ht. × Wd. | Tolerance Rating | Ht. | Wd. | Minimum Hardness | Specifications Met | Each | |
12" Lg. | |||||||
| 1/8" × 1/8" | Standard | -0.003" to 0.003" | -0.003" to 0.003" | Rockwell B35 | __ | 000000000 | 00000 |
| 5/32" × 5/32" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 0000 |
| 3/16" × 3/16" | Standard | -0.003" to 0.003" | -0.003" to 0.003" | Rockwell B35 | __ | 000000000 | 0000 |
| 1/4" × 1/4" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 0000 |
| 5/16" × 5/16" | Standard | -0.003" to 0.003" | -0.003" to 0.003" | Rockwell B35 | __ | 000000000 | 00000 |
| 3/8" × 3/8" | Standard | -0.003" to 0.003" | -0.003" to 0.003" | Rockwell B35 | __ | 000000000 | 00000 |
| 7/16" × 7/16" | Standard | -0.003" to 0.003" | -0.003" to 0.003" | Rockwell B35 | __ | 000000000 | 00000 |
| 1/2" × 1/2" | Standard | -0.003" to 0.003" | -0.003" to 0.003" | Rockwell B35 | __ | 000000000 | 00000 |
| 5/8" × 5/8" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 00000 |
| 3/4" × 3/4" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 00000 |
| 7/8" × 7/8" | Standard | -0.005" to 0.005" | -0.005" to 0.005" | Rockwell B35 | __ | 000000000 | 00000 |
| 1" × 1" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 00000 |
| 1 1/4" × 1 1/4" | Standard | -0.005" to 0.005" | -0.005" to 0.005" | Rockwell B35 | __ | 000000000 | 000000 |
36" Lg. | |||||||
| 1/8" × 1/8" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 0000 |
| 3/16" × 3/16" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 00000 |
| 1/4" × 1/4" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 00000 |
| 5/16" × 5/16" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 00000 |
| 3/8" × 3/8" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 00000 |
| 1/2" × 1/2" | Standard | -0.004" to 0.004" | -0.004" to 0.004" | Rockwell B35 | __ | 000000000 | 00000 |
305mm Lg. | |||||||
| 3mm × 3mm | Undersized | -0.030mm to 0.000mm | -0.030mm to 0.000mm | Rockwell B35 | DIN 6880 | 000000000 | 00000 |
| 4mm × 4mm | Undersized | -0.030mm to 0.000mm | -0.030mm to 0.000mm | Rockwell B35 | DIN 6880 | 000000000 | 00000 |
| 5mm × 5mm | Undersized | -0.030mm to 0.000mm | -0.030mm to 0.000mm | Rockwell B35 | DIN 6880 | 000000000 | 00000 |
| 6mm × 6mm | Undersized | -0.030mm to 0.000mm | -0.030mm to 0.000mm | Rockwell B35 | DIN 6880 | 000000000 | 00000 |
| 8mm × 8mm | Undersized | -0.036mm to 0.000mm | -0.036mm to 0.000mm | Rockwell B35 | DIN 6880 | 000000000 | 00000 |