Products · Nuts
Special nylon insert nuts
HAGUE FASTENERS makes nylon insert nuts to order: prevailing torque lock nuts with a nylon locking ring, made in superalloys, nickel alloys and stainless steels that regular stockists do not carry.
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
Nyloc nuts you cannot buy off the shelf
HAGUE FASTENERS makes nylon insert nuts in the UK when the grade, size or thread is not available from regular stockists. If it is not on a shelf somewhere, we can make it. We have made superalloy and critical specification nickel alloy nyloc nuts since 1971, and they are in service all over the world.
The nylon ring grips the bolt thread and resists loosening under vibration. Because the insert is polymer, the nut suits moderate service temperatures; for hotter duty we recommend an all-metal lock nut.
Where they are used
- Machinery and equipment subject to vibration
- Marine and offshore fittings
- Pumps, fans and rotating plant
- Enclosures and panel fixings
- Instrumentation and defence equipment
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 | Thin and standard height, flanged, domed, special body forms |
| Standards | DIN 982, DIN 985, DIN 986, ISO 7040, ISO 10511 |
| Grades | Steel property classes, A2 and A4 stainless, superalloy and nickel alloy bodies |
| 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 a nylon insert nut?
A nylon insert nut is a nut with a nylon ring that grips the mating thread, giving prevailing torque that resists loosening under vibration.
What temperature can nylon insert nuts take?
They are for moderate temperatures only, because the nylon softens as it gets hot. For higher temperatures we recommend an all-metal lock nut.
Can nylon insert nuts be reused?
They can usually be reused a limited number of times, but the locking torque falls each time. For safety-critical joints, fit new nuts.
Is there a minimum order quantity?
No. We make single prototypes and urgent breakdown replacements as well as batches of several hundred.
Lock nut enquiry?
Send us your drawing or specification
Tell us the size, thread, body material, quantity and documentation you need and we will come back to you quickly.