About Hex Head Screws and Bolts
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Key-Locking Plow Bolts
Fully Threaded
Partially Threaded
Also known as reverse-key plow screws and bucket-tooth bolts, these bolts have a locking key that keeps them from turning when tightening a nut. Often used on heavy equipment, such as plows, they have a smooth, flat head that's angled underneath to sit flush within countersunk holes. Material meets SAE J429 specifications for quality. Length is measured from the top of the head.
For technical drawings and 3-D models, click on a part number.
Head | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Threading | Min. Thread Lg. | Thread Spacing  | Dia. | Ht. | Tensile Strength, psi | Specifications Met | Each | |
Grade 8 Steel | |||||||||
5/8"-11 | |||||||||
| 2" | Fully Threaded | __ | Coarse | 1.121" | 0.414" | 150,000 | SAE J429 | 000000000 | 00000 |
| 2 1/2" | Partially Threaded | 1 1/2" | Coarse | 1.121" | 0.414" | 150,000 | SAE J429 | 000000000 | 0000 |
| 3" | Partially Threaded | 1 1/2" | Coarse | 1.121" | 0.414" | 150,000 | SAE J429 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 1/2" | Coarse | 1.121" | 0.414" | 150,000 | SAE J429 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 1/2" | Coarse | 1.121" | 0.414" | 150,000 | SAE J429 | 000000000 | 0000 |
| 5" | Partially Threaded | 1 1/2" | Coarse | 1.121" | 0.414" | 150,000 | SAE J429 | 000000000 | 0000 |
3/4"-10 | |||||||||
| 3" | Partially Threaded | 1 3/4" | Coarse | 1.277" | 0.44" | 150,000 | SAE J429 | 000000000 | 0000 |
| 3 1/2" | Partially Threaded | 1 3/4" | Coarse | 1.277" | 0.44" | 150,000 | SAE J429 | 000000000 | 0000 |
| 4" | Partially Threaded | 1 3/4" | Coarse | 1.277" | 0.44" | 150,000 | SAE J429 | 000000000 | 0000 |
| 4 1/2" | Partially Threaded | 1 3/4" | Coarse | 1.277" | 0.44" | 150,000 | SAE J429 | 000000000 | 00000 |
| 5" | Partially Threaded | 1 3/4" | Coarse | 1.277" | 0.44" | 150,000 | SAE J429 | 000000000 | 00000 |
| 6" | Partially Threaded | 1 3/4" | Coarse | 1.277" | 0.44" | 150,000 | SAE J429 | 000000000 | 00000 |
7/8"-9 | |||||||||
| 3 1/2" | Partially Threaded | 2" | Coarse | 1.516" | 0.616" | 150,000 | SAE J429 | 000000000 | 00000 |
| 4" | Partially Threaded | 2" | Coarse | 1.516" | 0.616" | 150,000 | SAE J429 | 000000000 | 00000 |
| 4 1/2" | Partially Threaded | 2" | Coarse | 1.516" | 0.616" | 150,000 | SAE J429 | 000000000 | 00000 |