Products
Special nuts, made to order
HAGUE FASTENERS makes special nuts to order in the UK: hex, heavy hex, jam, flange, square, dome, connector, slotted, castle, bihex, nylon insert and all-metal locking nuts, made to your drawing or standard in carbon steel, stainless, duplex and superalloys.
1971
Making special fasteners since
1 to 500
Single nuts to batches of several hundred
10 types
From hex nuts to locking nuts
UK, EU, US
Mill origin of every bar
Matched to the bolt
The nut that suits the joint
A nut has to match its bolt or stud in thread, grade and strength, and often in coating as well. HAGUE FASTENERS makes special nuts in the UK when the right nut cannot be bought: a superalloy or duplex grade, an uncommon thread, a special height or across-flats size, or a nut that must come with the same traceability as the stud it sits on.
We machine nuts from certified bar in our Willenhall facility, so we can supply a handful for a breakdown or a full set for a new flange joint, matched to studs and bolts we make at the same time.
Types
Nut types we make
Hex nuts
Standard and heavy hex nuts in any grade.
Hex jam nuts
Thin nuts used to lock against another nut.
Flange nuts
Integral flange spreads the load without a washer.
Square nuts
For channels, slots and heritage equipment.
Dome nuts
Closed end covers and protects the thread.
Connector nuts
Long nuts that join two threaded rods or studs.
Slotted and castle nuts
Slots take a split pin to secure the nut.
Bihex nuts
12-point nuts for compact, high strength joints.
Nylon insert nuts
Prevailing torque nuts with a nylon locking ring.
All-metal locking nuts
Prevailing torque nuts for higher temperatures.
Materials and threads
Any grade, any thread
See all fastener materials and coatings.
Typical materials
- Carbon and alloy steels, grades to match classes 8.8 to 14.9
- Grades to suit ASTM B7, B16 and L7 studs
- Stainless steels: A2, A4, 316, B8, B8M
- Duplex and super duplex
- Inconel, Monel and Hastelloy
- Bronzes, brass and polymers
Threads and finishes
- Metric coarse and fine, UNC, UNF, 8UN, BSW and BSF
- Left hand and special thread forms to drawing
- Zinc flake, zinc nickel and electroless nickel
- PTFE fluoropolymer coatings to match studs
- Heat treatment by approved partners
- Laser-marked heat codes and part numbers
Industries
Nuts for safety-critical joints
Our special nuts go onto pressure vessel flanges, subsea equipment, turbines and nuclear plant, where a nut of the wrong grade or thread can compromise the whole joint.
- Nuclear QC1 safety-critical parts
- Oil and gas downhole, subsea and topside
- Power generation turbines and plant
- Chemical process in corrosion resistant grades
- Shipbuilding and marine
Questions
Frequently asked questions
Can you make special nuts to match my studs?
Yes. We make special nuts in the grade, thread and coating that match your studs or bolts, and can supply them as complete traceable sets.
What is the difference between a nylon insert nut and an all-metal locking nut?
Both resist loosening by prevailing torque. A nylon insert nut uses a polymer ring, which limits its service temperature, while an all-metal locking nut can be used where heat rules out nylon.
Can you make nuts in superalloys?
Yes. We machine nuts in Inconel, Monel, Hastelloy, duplex, super duplex and other alloys from certified bar.
Do you make nuts with BSW or BSF threads?
Yes. We cut British, unified and metric threads, including the older forms that are now hard to find.
Do you supply certificates?
Yes. We supply certificates of conformity and EN 10204 3.1 or 3.2 material certificates, with independent UKAS-accredited test reports where required. See quality.
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.
Nut enquiry?
Send us the thread and grade
Tell us the type, thread, grade, quantity and documentation you need, or send a sample, and we will quote quickly.