Products
Special bolts, made to order
HAGUE FASTENERS makes special bolts to order in the UK: hexagon bolts, setscrews, 12-point, fitted, swing, square head, carriage, hook and T bolts, made to your drawing or the standard you specify, in carbon and alloy steels, stainless, duplex and superalloys.
1971
Making special bolts for over half a century
1 to 500
Single prototypes to batches of several hundred
12
Standards libraries, from BS and ISO to ASTM and JIS
8.8 to 14.9
Strength classes, plus ASTM B7, B16, L7, B8 and B8M
When off the shelf will not do
Bolts nobody else stocks
Most of the bolts we make cannot be bought from a catalogue: a special length or head, a superalloy or duplex grade, an uncommon thread, or a standard bolt that must be made from UK, EU or US material with full traceability.
Everything is turned, milled and threaded in our own facility in Willenhall, so we control quality, lead time and documentation from bar to finished part.
Four kinds of special
- Customer and OEM drawings for parts that exist nowhere else
- Catalogue sizes in grades nobody stocks
- Assured UK, EU or US material origin
- Metric fine, BSW, BSF, UNC, UNF and other hard-to-find threads
- Reverse engineering from a sample or photograph
Types
Bolt types we make
Hexagon bolts
Part-threaded hexagon head bolts in any grade and size.
Hexagon setscrews
Fully threaded hexagon head screws.
12-point bolts
Bi-hex or ferry head bolts for high strength, compact joints.
Fitted bolts
Precision ground shanks for accurate location and shear.
Hex flange bolts
Integral flange spreads the load without a washer.
Swing bolts
Eye bolts that pivot for quick-release closures.
Square head bolts
Traditional heads for heritage and heavy plant.
Carriage bolts
Domed head with square neck that locks in place.
T bolts
T-shaped heads for slots and channels.
Hook bolts
Hooked bolts for anchoring and suspension.
Machine screws
Small diameter screws in special materials.
Insulated bolts
Sleeved and washered to isolate flanges.
Materials and finishes
Any grade, any finish
See all fastener materials and coatings.
Typical materials
Threads, drives and finishes
- Metric coarse and fine, UNC, UNF, UN, BSW, BSF and special forms
- Cut or rolled threads
- Hexagon, socket, Torx, 12-point and special drives
- Zinc flake, zinc nickel, electroless nickel and PTFE coatings
- Heat treatment and NDT by approved partners
- Laser-marked heat codes and part numbers
Industries
Bolts for safety-critical service
Our bolts go into nuclear plant, defence equipment, offshore platforms, power stations and chemical works, where a failure is not an option and every part needs a certificate behind it.
- Nuclear QC1 safety-critical bolting
- 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 bolts to my drawing?
Yes. Most of our bolts are made to customer and OEM drawings. Send the drawing with the quantity, material and documentation you need.
What is the minimum order quantity?
There is no minimum. We make single prototypes and breakdown replacements as well as batches of several hundred.
Can you copy a bolt from a sample?
Yes. Send a photograph beside a rule for a quick estimate, then the sample. We can replicate it, with an upgraded material, length or thread form if needed.
What is the difference between a hexagon bolt and a setscrew?
A hexagon bolt has a plain shank under the head and is threaded for part of its length. A setscrew is threaded all the way to the head.
Do you supply certificates with bolts?
Yes. We supply certificates of conformity and EN 10204 3.1 or 3.2 material certificates, with independent test reports where required. See quality.
Useful tools
Free engineering tools
- Bolt torque calculator: tightening torque and preload for metric, UNC, UNF, BSW and BSF threads.
- Hardness conversion calculator: convert Rockwell, Vickers and Brinell hardness, with approximate tensile strength.
- Material equivalents finder: find the EN, UNS, ASTM, BS and JIS equivalents of a grade, such as 1.4462 or 316.
- 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.
Bolt enquiry?
Send us the difficult ones
Send your drawing, specification or sample, with quantity, material and documentation requirements, and we will come back to you quickly.