Washer Head Bolts
Washer Head Bolts
Washer head bolts are used when the head of the bolt sits flush to a wooden member. The forged washer side provides a larger bearing surface so that when the bolt is tightened, the wood underneath the head is not damaged. Washer head bolts have an added semi-cone point and a thread length unique to pole line fasteners depending on the length of the bolt. Washer head bolts normally have a square nut assembled, but can also have a hex nut assembled.
| Bolt Diameter | D | H | W | B | C | F | |||
|---|---|---|---|---|---|---|---|---|---|
| Body Diameter | Height (Head) | Height (Washer) | Outside Diameter (Washer) | Width Across Corners (Head) | Width Across Flats (Head) | ||||
| Max | Min | Basic | Max | Min | |||||
| 1⁄2 | 0.515 | 0.290 | 0.130 | 1.40 | 1.061 | 0.995 | 3⁄4 | 0.750 | 0.725 |
| 5⁄8 | 0.642 | 0.420 | 0.125 | 1.80 | 1.326 | 1.244 | 15⁄16 | 0.938 | 0.906 |
| 3⁄4 | 0.768 | 0.490 | 0.110 | 2.20 | 1.591 | 1.494 | 11⁄8 | 1.125 | 1.088 |
| 7⁄8 | 0.895 | 0.640 | 0.180 | 2.60 | 1.856 | 1.742 | 15⁄16 | 1.312 | 1.269 |
Standard Thread Lengths
| *Bolts shorter and/or smaller than those listed in the table shall have minimum thread lengths in accordance with American National Standard for Square and Hex Bolts and Screws, B18.2.1* | ||
| Diameters | Bolt length | Thread length |
|---|---|---|
3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″ | 4″ up to less than 8″ | 3″ |
3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/4″ | 8″ up to less than 12″ | 4″ |
3/8″, 1/2″, 5/8″, 3/4″, 7/8″, 1″, 1-1/4″ | 12″ and over | 6″ |
