Products · Nuts
Special hex nuts, made to order
HAGUE FASTENERS makes hex nuts to order: hexagon nuts in regular, heavy and modified patterns, made in our Willenhall facility in alloy steels, stainless, duplex and superalloys, fully traceable.
1971
Making special nuts for over half a century
1 to 500
Single prototypes to batches of several hundred
A194
Petrochemical grades, plus classes to 12
UK, EU, US
Mill origin of every bar we use
Nuts
The most common nut, in the grades nobody stocks
HAGUE FASTENERS makes special hex nuts in the UK for buyers who cannot find the right grade, size or thread on the shelf. Many of the hex nuts we make are in duplex and super duplex steels, or in high specification superalloys for critical duty.
We make BSW, BSF, UNC and UNF threads, but the biggest call now is for modified standards and nuts made to customer or OEM drawings.
Where they are used
- Flange and pressure equipment bolting
- Pumps, valves and compressors
- Offshore and subsea equipment
- Power plant and turbines
Typical specifications
Options we make to
The standards listed are those we are most often asked to make to or modify. The part supplied always follows your drawing or specification.
| Option | Typical choices |
|---|---|
| Forms | Regular and heavy hex, thin and tall patterns, chamfered or washer faced, cross-drilled |
| Standards | ISO 4032, ISO 4033, ISO 8674, DIN 934, DIN 555, DIN 6915, BS 57, BS 1083, BS 1768, BS 1769, BS 3692, BS 4395, ASME B18.2.2 |
| Grades | Property classes 8, 10 and 12; ASTM A194 2H, 4, 7, 8 and 8M |
| Threads | Metric coarse and fine, UNC, UNF, UN, BSW, BSF and special forms |
| Finishes | Plain, passivated, zinc flake, zinc nickel, electroless nickel, PTFE and others via coatings |
| Documentation | CoC, EN 10204 3.1 and 3.2, test reports, laser-marked heat codes |
Materials
Any grade, made in the UK
See all fastener materials. Grades are selected for corrosion, temperature and strength, and we are happy to advise.
Typical materials
- Carbon and alloy steels: mild steel, EN16, EN24, ASTM A194 2H, 4 and 7
- Stainless steels: A2, A4, 316, ASTM A194 8 and 8M, 17-4PH
- Duplex and super duplex: S31803, S32750, S32760
- Inconel, Incoloy and Monel
- Hastelloy and titanium
- Bronzes, brass and copper alloys
Why buyers come to us
- Made in our Willenhall facility, from one-offs to several hundred
- Bar from UK, EU and US mills only, with heat traceability
- Modified standards and parts to customer or OEM drawings
- EN 10204 3.1 or 3.2 certificates and UKAS-accredited testing
- Copies made from a sample or photograph, with upgrades if needed
Related products
Related types
All nut types
Back to the nuts family
Custom fasteners
Made to your drawing
Questions
Frequently asked questions
What is the difference between hex nuts and heavy hex nuts?
A heavy hex nut has larger across-flats and is usually thicker than a regular nut of the same thread. Heavy hex nuts are used with high strength studbolts on flanges and pressure equipment.
Which hex nuts go with B7 studbolts?
ASTM A194 grade 2H heavy hex nuts are the usual partner for A193 B7 studbolts. We make them, along with grade 4, 7, 8 and 8M nuts for other duties.
Can you make hex nuts in super duplex?
Yes. Super duplex and nickel alloy hex nuts are a large part of our work.
Is there a minimum order quantity?
No. We make single prototypes and urgent breakdown replacements as well as batches of several hundred.
Useful tools
Free engineering tools
- Stud bolt weight calculator: weigh studs and nuts for one piece or a whole order, in kg and lb.
- Bolt torque calculator: tightening torque and preload for metric, UNC, UNF, BSW and BSF threads.
- Thread size chart and identifier: pitch, diameters, stress area and tapping drill, or identify an unknown thread.
Free to use, no sign-up. See all our engineering tools.
Hex nut enquiry?
Send us your drawing or specification
Tell us the size, thread, grade, quantity and documentation you need and we will come back to you quickly.