Also known as dome head, fender head, safety head, mushroom head bolts and economy bolts in the Pacific NW; Timber bolts are used largely in marine and wood applications.
The head of a timber bolt is rounded, bulky and low profile while there are two fins or nubs towards the base of its head. These nubs ascertain that the bolt does not, at any point, turn in the timber. Besides, the bulky head helps cut out on cost because it eliminates the need for a possible malleable iron washer.
Manufacturing
BBI manufactures superior quality timber bolts. With a diameter of 1/2″ – 1-1/2″, these bolts fulfill most specifications of the ASTM, SAE and AASHTO. In fact, we can even create special tooling to help produce nonstandard bolt heads / head dimensions with your preferred logo and/or name.
Stock
Grade: A307
Diameters: 3/4″
Lengths: 8″ – 36″ in 2″ increments
Origin: Domestic
Finish: Hot-dip galvanized
Stock Thread Length
Bolt lengths ≤ 12″: 4″ thread
Bolt lengths 14″-16″: 6″ thread
Bolt lengths ≥ 18″: 8″ thread
Timber Bolt Dimensions
| Bolt Diameter | D | F | H |
|---|---|---|---|
| Body Diameter Max | Head Diameter | Head Height | |
| 1⁄2 | 0.515 | 11⁄2 | 1⁄4 |
| 5⁄8 | 0.642 | 115⁄16 | 5⁄16 |
| 3⁄4 | 0.768 | 21⁄4 | 3⁄8 |
| 7⁄8 | 0.895 | 25⁄8 | 7⁄16 |
| 1 | 1.022 | 27⁄8 | 1⁄2 |
| 11⁄8 | 1.149 | 27⁄8 | 1⁄2 |
| 11⁄4 | 1.277 | 27⁄8 | 1⁄2 |
| 13⁄8 | 1.404 | 3 | 3⁄8 |
| 11⁄2* | 1.531 | 3 | 3⁄8 |
| * No nubs on underside of head | |||
Stock Timber Bolts
| Length | Diameter |
|---|---|
| 3/4″ | |
| Galv. | |
| 8 | 18549 |
| 10 | 18553 |
| 12 | 18557 |
| 14 | 18561 |
| 16 | 18565 |
| 18 | 18569 |
| 20 | 18573 |
| 22 | 18577 |
| 24 | 18581 |
| 26 | 18583 |
| 28 | 18585 |
| 30 | 18587 |
| 32 | 18589 |
| 36 | 18595 |
| Other sizes and finishes available on request. | |