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About Shoulder Screws
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Metric Steel Hex Head Shoulder Screws
Also known as wheel and axle bolts, these metric screws have an unthreaded shoulder that acts as a shaft, so material attached to the threaded end can rotate. Made of steel, they are strong enough to withstand pulling and stretching without breaking. They are often used with bearings, pulleys, valves, and pumps. The hex head lets you tighten these screws with a wrench, and keeps them in place once they are installed. All of these screws meet DIN 609, which is an international standard for shoulder screw dimensions.
For technical drawings and 3-D models, click on a part number.
Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Shoulder Lg., mm | Thread Size  | Thread Pitch, mm | Thread Lg., mm | Head Wd., mm | Head Ht., mm | Tensile Strength, psi | Specifications Met | 1-4 | 5-Up | |
9 mm Shoulder Dia.—Standard Fit (0.001 mm to 0.01 mm Dia. Tolerance) | ||||||||||
| 8 | M8 | 1.25 | 14.5 | 13 | 5.5 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 13 | M8 | 1.25 | 14.5 | 13 | 5.5 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 18 | M8 | 1.25 | 14.5 | 13 | 5.5 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 23 | M8 | 1.25 | 14.5 | 13 | 5.5 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 28 | M8 | 1.25 | 14.5 | 13 | 5.5 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 33 | M8 | 1.25 | 16.5 | 13 | 5.5 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 41 | M8 | 1.25 | 16.5 | 13 | 5.5 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
11 mm Shoulder Dia.—Standard Fit (0.001 mm to 0.012 mm Dia. Tolerance) | ||||||||||
| 10 | M10 | 1.5 | 17.5 | 17 | 7 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 15 | M10 | 1.5 | 17.5 | 17 | 7 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 20 | M10 | 1.5 | 17.5 | 17 | 7 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 25 | M10 | 1.5 | 17.5 | 17 | 7 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 30 | M10 | 1.5 | 19.5 | 17 | 7 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 33 | M10 | 1.5 | 19.5 | 17 | 7 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 38 | M10 | 1.5 | 19.5 | 17 | 7 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 48 | M10 | 1.5 | 19.5 | 17 | 7 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
13 mm Shoulder Dia.—Standard Fit (0.001 mm to 0.012 mm Dia. Tolerance) | ||||||||||
| 11.5 | M12 | 1.75 | 20.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 16.5 | M12 | 1.75 | 20.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 21.5 | M12 | 1.75 | 20.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 26.5 | M12 | 1.75 | 22.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 29.5 | M12 | 1.75 | 22.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 34.5 | M12 | 1.75 | 22.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 44.5 | M12 | 1.75 | 22.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
| 54.5 | M12 | 1.75 | 22.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 00000 | 0000 |
| 74.5 | M12 | 1.75 | 22.5 | 19 | 8 | 120,000 | DIN 609 | 000000000 | 0000 | 0000 |
17 mm Shoulder Dia.—Standard Fit (0.001 mm to 0.012 mm Dia. Tolerance) | ||||||||||
| 21.5 | M16 | 2 | 27 | 24 | 10 | 120,000 | DIN 609 | 000000000 | 00000 | 0000 |
| 29.5 | M16 | 2 | 27 | 24 | 10 | 120,000 | DIN 609 | 000000000 | 00000 | 0000 |
| 39.5 | M16 | 2 | 27 | 24 | 10 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 49.5 | M16 | 2 | 27 | 24 | 10 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 59.5 | M16 | 2 | 27 | 24 | 10 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 69.5 | M16 | 2 | 27 | 24 | 10 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
21 mm Shoulder Dia.—Standard Fit (0.002 mm to 0.015 mm Dia. Tolerance) | ||||||||||
| 17.5 | M20 | 2.5 | 30.5 | 30 | 13 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 25.5 | M20 | 2.5 | 30.5 | 30 | 13 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 35.5 | M20 | 2.5 | 30.5 | 30 | 13 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 45.5 | M20 | 2.5 | 30.5 | 30 | 13 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 55.5 | M20 | 2.5 | 30.5 | 30 | 13 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 65.5 | M20 | 2.5 | 30.5 | 30 | 13 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 85.5 | M20 | 2.5 | 30.5 | 30 | 13 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
| 105.5 | M20 | 2.5 | 30.5 | 30 | 13 | 120,000 | DIN 609 | 000000000 | 00000 | 00000 |
Steel Hex Head Shoulder Screws
A zinc plating provides mild corrosion resistance. Also known as wheel and axle bolts, these shoulder screws have a hex head that can be gripped with a wrench. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment.
For technical drawings and 3-D models, click on a part number.
Each | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Shoulder Lg. | Thread Size | Thread Lg. | Head Wd. | Head Ht. | Finish | Tensile Strength, psi | 1-4 | 5-Up | |
3/8" Shoulder Dia.—Standard Fit (-0.004" to 0" Dia. Tolerance) | |||||||||
| 1 5/16" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 00000 | 00000 |
| 1 3/8" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 7/16" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 1/2" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 9/16" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 5/8" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 3/4" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 00000 | 0000 |
| 1 7/8" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 00000 | 0000 |
| 2" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 00000 | 0000 |
| 2 1/8" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 00000 | 00000 |
| 2 1/4" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 00000 | 00000 |
| 2 1/2" | 1/4"-20 | 3/4" | 5/8" | 3/16" | Zinc Plated | 70,000 | 000000000 | 00000 | 00000 |
1/2" Shoulder Dia.—Standard Fit (-0.004" to 0" Dia. Tolerance) | |||||||||
| 1 5/16" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 3/8" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 7/16" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 1/2" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 9/16" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 5/8" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 3/4" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 1 7/8" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 2" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 2 1/8" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 2 1/4" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
| 2 1/2" | 3/8"-16 | 3/4" | 3/4" | 1/4" | Zinc Plated | 70,000 | 000000000 | 0000 | 0000 |
Stainless Steel Hex Head Shoulder Screws
Stainless steel shoulder screws have excellent corrosion resistance in most environments. Also known as wheel and axle bolts, these shoulder screws have a hex head that can be gripped with a wrench. A standard shoulder with an undersized tolerance allows them to fit most machinery and equipment.
For technical drawings and 3-D models, click on a part number.
Each | ||||||||
|---|---|---|---|---|---|---|---|---|
| Shoulder Lg. | Thread Size | Thread Lg. | Head Wd. | Head Ht. | Tensile Strength, psi | 1-4 | 5-Up | |
3/8" Shoulder Dia.—Standard Fit (-0.004" to 0" Dia. Tolerance) | ||||||||
| 1 5/16" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 000000 | 000000 |
| 1 3/8" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 1 7/16" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 1 1/2" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 1 9/16" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 1 5/8" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 1 3/4" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 1 7/8" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 2" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 2 1/8" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 2 1/4" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
| 2 1/2" | 1/4"-20 | 3/4" | 5/8" | 3/16" | 70,000 | 000000000 | 00000 | 00000 |
1/2" Shoulder Dia.—Standard Fit (-0.004" to 0" Dia. Tolerance) | ||||||||
| 1 5/16" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 1 3/8" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 1 7/16" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 1 1/2" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 1 9/16" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 1 5/8" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 1 3/4" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 1 7/8" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 2" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 2 1/8" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 2 1/4" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |
| 2 1/2" | 3/8"-16 | 3/4" | 3/4" | 1/4" | 70,000 | 000000000 | 00000 | 00000 |