Bolts
Hex bolts and nut-bolt sets, supplied to the dimensions and grade your drawing or standard specifies, with matching nuts and washers.
- Finishes
- Plain, Zinc plated, Rilsan coated (blue), Hot-dip galvanised, Dacromet, Geomet, Zinc-nickel plated, Mechanically galvanised, PTFE coated
- Materials
- Carbon steel, Alloy steel, Stainless 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 | ISO 4014, ISO 4016, ISO 4017, ISO 898-1, DIN 931, DIN 933, DIN 601, ASME B18.2.1, ASTM A307, ASTM A325, ASTM A490, BS 3692, BS 4190, AS 1111, AS 1252, IS 1363, IS 1364, IS 1367-3, BS 1083, BS 1768 |
|---|---|
| Materials | Carbon steel, Alloy steel, Stainless steel |
| Grades | 4.6, 4.8, 5.6, 6.8, 8.8, 10.9, SAE Gr 2, SAE Gr 5, SAE Gr 8, ASTM A325, ASTM A490, B7 |
| Finishes | Plain, Zinc plated, Rilsan coated (blue), Hot-dip galvanised, Dacromet, Geomet, Zinc-nickel plated, Mechanically galvanised, PTFE coated |
| Sizes | M4 to M80; lengths up to 3,000 mm |
Types: hex, heavy hex, structural (HSFG), flange, cup head (carriage), countersunk, dome head, socket head cap, wheel and guard-rail bolts, and machine screws to your drawing.
Cold-forged from M4 to M30 and hot-forged from M10 to M80, with metric, UNC, UNF, BSW and BSF threads. Bolts can be supplied as sets with matching nuts and washers.
Reference data by size.
For planning and freight. Your order is quoted to the standard, class and finish you specify.
| Size | Pitch (mm) | Across flats ISO (mm) | Across flats DIN (mm) | Head height k (mm) | Proof load 8.8 (kN) |
|---|---|---|---|---|---|
| M6 | 1.00 | 10 | 10 | 4.0 | 11.7 |
| M8 | 1.25 | 13 | 13 | 5.3 | 21.2 |
| M10 | 1.50 | 16 | 17 | 6.4 | 33.6 |
| M12 | 1.75 | 18 | 19 | 7.5 | 48.9 |
| M16 | 2.00 | 24 | 24 | 10.0 | 90.9 |
| M20 | 2.50 | 30 | 30 | 12.5 | 146.9 |
| M24 | 3.00 | 36 | 36 | 15.0 | 211.5 |
How to specify it.
A complete order line removes most of the back-and-forth. Write it in this order:
Hexagon head bolt - ISO 4014 - M12 × 80 - 8.8 - zinc plated
- ISO or DINISO 4014 and DIN 931 differ in across flats for M10, M12, M14 and M22; say which your drawing uses.
- Part or full threadISO 4014 (DIN 931) is part-threaded; ISO 4017 (DIN 933) is threaded to the head.
- High class, electroplatedElectroplated 10.9 and 12.9 bolts carry a hydrogen-embrittlement risk; agree the coating with the order.
Photographs.
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
Questions buyers ask.
What is the difference between ISO 4014 and DIN 931 bolts?
The thread and property classes are the same. Across flats differ for M10 (16 vs 17 mm), M12 (18 vs 19 mm), M14 (21 vs 22 mm) and M22 (34 vs 32 mm), so spanners and drawings must match.
Which nut should I use with an 8.8 bolt?
A class 8 nut, for example ISO 4032 class 8. Use class 10 nuts with 10.9 bolts.
