How we deliver:
- Understanding your needs
- Quoting with care
- Exclusive Preparation Method
- Production
- Pack & Deliver, Your Way
Also known as dome head, fender head, safety head, mushroom head, and economy bolts in the Pacific Northwest, timber bolts are used primarily in marine and wood applications. The head of a timber bolt is rounded, bulky, and low-profile, with two fins or nubs located near the base of the head. These nubs prevent the bolt from turning within the timber during installation and service. Additionally, the wide, bulky head helps reduce overall cost by eliminating the need for a separate malleable iron washer.
Manufacturing
BBI manufactures superior-quality timber bolts in diameters ranging from 1/2″ to 1-1/2″, meeting most ASTM, SAE, and AASHTO specifications. We also offer custom manufacturing through special tooling to produce non-standard bolt heads and head dimensions, including your preferred logo and/or company name for customized branding.
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. | |