Galvanized Bolts & Nuts
Hot-dip and mechanically galvanised bolts, nuts and washers for outdoor and structural steelwork, including ASTM A325 structural bolts, A563 DH nuts, F436 washers, A307 bolts and studs, and DIN 6914/6915/6916 sets.
- Finishes
- Hot-dip galvanised, Mechanically galvanised
- Materials
- Carbon steel, Alloy steel
- Inspection
- Before dispatch · video on request
- Incoterms
- All, EXW to DDP
Specification.
Stated as we supply it. Anything not listed is made to your drawing or standard; ask and we confirm before quoting.
| Standards | ASTM A325, ASTM A563, ASTM F436, ASTM A307, ASTM A449, ASTM F1852, DIN 6914, DIN 6915, DIN 6916 |
|---|---|
| Materials | Carbon steel, Alloy steel |
| Finishes | Hot-dip galvanised, Mechanically galvanised |
Hot-dip galvanised: the fasteners are cleaned, pickled, fluxed and dipped in a bath of at least 98 % zinc at 460 to 550 °C, then spun in a centrifuge to clear the threads. Typical coating thickness is 54 µm on average and 43 µm on any single part.
Mechanically galvanised: zinc is applied at room temperature in a rotating barrel, with no acid pickling and no heat, so high-strength fasteners are not re-tempered and are protected against hydrogen embrittlement. Typical coating is at least 43 µm, nuts are tapped oversize before coating, and typical salt-spray resistance is 192 hours to red rust. Used for A325 bolts, A563 DH nuts, A307 bolts and studs, A449 cap screws, F1852 tension-control assemblies, F436 washers and DIN 6914/6915/6916 sets.
Every lot is traceable to its manufacturing lot number. The coating values are typical figures from our partner manufacturer's published data: tell us the coating standard your project specifies and we will confirm it before you order.
Inspection you can watch.
Every order is visually inspected before dispatch. You choose how closely you look.
Before dispatch
Visual inspection against the agreed specification.
On a video call
Watch the inspection live, on request.
Third party
An inspection agency of your choice, on request.
What to send for a quote.
The more of this you include, the faster and firmer the quotation.
- Drawing, sample photo or the standard the part must meet
- Material, grade or property class, and finish
- Size or dimensions, and quantity per order and per year
- Destination port or city, and the Incoterm you prefer
- Documents you need with the shipment, and whether you want video or third-party inspection
