Fastener Manufacturer – Bespoke Bar-Turned Nuts UK
If you can't get through on the mainline please call 07967 68 82 24 Read More
Precision Fastener Manufacturer UK – Bespoke Bar-Turned Nuts | Trojan Special Fasteners Ltd
Trojan Special Fasteners Ltd is a UK manufacturer of bespoke bar-turned nuts and precision fasteners, based in Birmingham. We are ISO 9001:2015 certified and specialise in custom components including hexagon nuts, castle nuts, connector nuts, and prevailing torque locking nuts in both standard and non-standard sizes. With over 31 years of experience, we manufacture from M3 to M52 in metric and 1/4" to 2.1/4" in imperial and unified threads.
What We Do
Trojan Special Fasteners Ltd manufactures internally threaded fasteners by CNC turning from bright bar. We produce *bespoke fasteners* to customer drawings, samples, or specifications in a wide range of materials, thread forms, and finishes. All machining is carried out in-house at our Birmingham facility, giving us full control over quality, lead times, and traceability.
We are not a distributor or reseller. Every fastener we supply is manufactured on our own machines by our own team.
Our Product Range
Hexagon nuts – full nuts, lock nuts, jam nuts, and heavy hex in standard and non-standard sizes
Castle and slotted nuts – castellated nuts with 2, 4, 6, 8, or 12 slots for split pin retention
Flange and collar nuts – flanged nuts with or without serrations, collar nuts, and shouldered variants
Nylon insert locking nuts – prevailing torque nuts to DIN 982, DIN 985, DIN 6924, ISO 7040, ISO 7041, BS 4929, and ASME B18/B16
All-metal prevailing torque nuts – Stover-type and thread-distorted locking nuts to DIN 980 and ASME standards
Connector and coupling nuts – extended-length nuts for joining threaded rods, including mixed-thread combinations
Square nuts – machined from square bar or milled from round
Round nuts and spacers – cylindrical nuts, boss nuts, and spacers
Dome, cap, and acorn nuts – blind nuts for aesthetic and protective applications
Wheel nuts – conical-seat wheel nuts for automotive, commercial vehicle, and trailer applications
Washers and spacers – flat washers, spacers, and bosses turned from bar
Special nuts – any bespoke design to your drawing or sample
View Full Product Range
When to Use Trojan Special Fasteners
Our services are most valuable when standard catalogue fasteners do not meet your requirements. Typical situations include:
Non-standard or intermediate sizes – thread sizes, pitches, or across-flat dimensions not available from stock
Mixed thread combinations – different thread forms or sizes on each end of the same component
Unusual materials – requirements for specific grades of stainless steel, bronze, brass, aluminium, or high-tensile steel
Custom features – castellation, flanges, collars, spigots, slots, holes, domes, or other machined features
Obsolete or legacy threads – BSW, BSF, BA, CEI, BSCy, BSG, and other imperial thread forms
Small quantities or prototypes – single units through to production volumes with no minimum order quantity
Urgent requirements – fast turnaround when standard supply chains cannot deliver
Manufacturing Capabilities
All manufacturing takes place in-house at our Birmingham facility. Our capabilities include:
CNC and conventional automatic lathes for rapid setup and consistent part quality
Polygon turning to produce hexagon, square, and other polygon profiles directly from round bar
Comprehensive tapping in metric, imperial, and unified thread forms including left-hand and multi-start
Cross-drilling, slotting, and secondary operations
Thread distortion for all-metal prevailing torque features
In-house inspection with calibrated gauges and a climate-controlled measurement room
View Our Services
Why Trojan Special Fasteners?
- UK Manufacturing to the highest standards
- Specialists in hard to find items
- Quick deliveries
- Fully traceable manufacturing and delivery
- Fully compliant ISO 9001:2015 quality standard
- Certificates in materials, heat treatment and plating available
- Certificates of Conformity
- Reliable, professional and courteous service
- Large and hard to find nut manufacturer
Our Manufacturing Capabilities at a Glance
What We Can Manufacture
Thread Sizes and Forms
We manufacture in the following thread ranges:
Metric: M3 to M56 in coarse, fine, extra fine, and non-preferred pitches
Imperial and Unified: 6BA to 2.1/2" including UNC, UNF, UNEF, BSW, BSF, BSP, BSPP, BA, BSG, BSCy, CEI, and stay thread forms
Custom pitches and non-standard thread forms* are available on request
Materials
Steel: mild steel (EN1A, EN3B), high tensile (EN8, EN16T, Grade 8, Grade 10, Grade 12)
Stainless steel: 303, 304, 316, 410, 430
Brass: CZ121/CW614N (free-cutting), Naval Brass C46400
Bronze: phosphor bronze, aluminium bronze
Aluminium: 6082, 2011
Copper: C101
Other materials including nylon and NES833 available on request
Material certificates to EN 10204 3.1 are available for all orders.
Finishes
Self colour or oiled
Zinc plated – clear, yellow, or black passivate
Zinc-flake coatings – Dacromet, Geomet, and equivalent systems
Phosphate – chemi-black or Parkerised
Hot-dip galvanised
Nickel plated
Chrome plated
Passivated
Quality Assurance
We are accredited to *ISO 9001:2015* and maintain full traceability throughout production. Our quality procedures include:
First-off inspection and in-process checks
GO/NO-GO thread gauge verification
Dimensional inspection to customer specifications
Material traceability from bar stock to finished component
Documentation available with every order includes material certificates, heat treatment certificates, plating certificates, certificates of conformity, and initial sample inspection reports as required.
Industries We Serve
Railway and rolling stock – stay nuts, boiler fasteners, heritage restoration components, and modern rolling stock fixings
Automotive and motorsport – wheel nuts, axle nuts, hub nuts, and performance fasteners
Aerospace and defence – precision fasteners to exacting tolerances with certified materials and full documentation
Construction and civil engineering – structural nuts and heavy-duty fasteners for steel fabrications
Marine and offshore – corrosion-resistant fasteners in stainless steel and bronze for harsh environments
Industrial machinery – OEM and aftermarket fasteners for plant, processing, and manufacturing equipment
Other sectors – food processing, pharmaceutical, chemical, power generation, water treatment, and agricultural machinery
Why Customers Choose Trojan Special Fasteners
UK manufacturer – all machining in-house at our Birmingham facility, not imported or resold
31+ years of experience – proven capability across thousands of different specifications
ISO 9001:2015 certified – documented quality management with full traceability
No minimum order quantity – single prototypes through to production runs of thousands
Fast turnaround – same-day quotes, 3–5 working days for standard items, 7–10 days for bespoke
Technical support – experienced engineers to assist with specification, material selection, and design
Competitive pricing – direct from manufacturer with no middlemen or unnecessary markups
Bespoke specialists – the unusual jobs others cannot or will not do are our core business
Frequently Asked Questions
What sizes of nuts can you manufacture?
We manufacture nuts from M3 to M52 and above in metric, and from 6BA to 2.1/4" in imperial and unified sizes. Non-standard and intermediate sizes are available to customer specification.
What materials do you work with?
We machine mild steel, high tensile steel, stainless steel (303, 304, 316), brass, phosphor bronze, aluminium, copper, and nylon. Material certificates to EN 10204 3.1 are supplied on request.
What is your typical lead time?
Standard items in common materials are typically 3–5 working days. Bespoke items or unusual materials are 7–10 working days. Expedited service is available for urgent requirements.
Can you manufacture from a sample or drawing?
Yes. Send us a sample nut, a dimensioned drawing (PDF, DWG, DXF), or a verbal specification and we will provide a quotation. We regularly duplicate legacy or obsolete fasteners from samples.
Do you have a minimum order quantity?
No. We manufacture single prototypes, small trial batches, and full production runs with equal capability. Our efficient setup makes single-unit quantities economically viable.
Contact Us
To discuss your bespoke fastener requirements, contact us by telephone on +44 (0)121 789 8586 or use the form on our contact page. We provide same-day quotations on most enquiries.
Trojan Special Fasteners Ltd, 18 Fortnum Close, Kitts Green, Birmingham B33 0LG.