SPecialist fasteners company in the UK

High Quality Bespoke Large Nuts & Fasteners

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Trojan Special Fasteners Ltd is a UK manufacturer of bespoke bar-turned nuts and precision fasteners, based in Birmingham.

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.


All-Metal Prevailing Torque Nuts
All-Metal Prevailing Torque Nuts: Complete Manufacturing Guide
Trojan Special Fasteners Ltd manufactures precision all-metal prevailing torque nuts to customer specifications across multiple material and finish combinations.

Based in Birmingham, UK, we've supplied industries with high-performance locking fasteners for over 31 years.

Connector Nuts
Trojan Special Fasteners Ltd manufactures high-quality connector nuts (also known as coupling nuts, joining nuts, extension nuts, long nuts, and studding connectors) to exact customer specifications. With over 30 years of experience, we supply connector nuts across the complete size range from M3 to M52 metric, 2BA to 2" imperial (BSW/BSF), and #8 to 2¼" unified threads (UNC/UNF/UNEF) in hex, round, square, and custom profiles.

Dome & Cap Nuts
Trojan Special Fasteners Ltd can manufacture a number of dome and acorn cap nuts to standard, your drawing, sample or your specification. We can provide a head polishing service on some sizes too – just ask at quotation stage.

Flange Nuts
Trojan Special Fasteners Ltd manufactures high-precision flange nuts and collar nuts using advanced bar turning techniques. As a specialist UK fastener manufacturer, we produce standard and bespoke hexagon flange nuts from M6 to M52 in metric sizes(Coarse, Fine, Extra Fine), 3/8" to 2" in Imperial (BSW/BSF/Whitform), and 3/8" to 2" in Unified (UNF, UNC, UNS, UNEF) thread forms and in left hand and oversize.

Hex Nuts
Trojan Special Fasteners Ltd manufactures precision hexagon nuts (hex nuts) to exacting specifications for engineering, construction, automotive, rail, aerospace, and industrial applications throughout the UK and internationally. As a specialist bespoke hex nut manufacturer based in Birmingham, we produce nuts from M3 to M52 in metric, 2BA to 2" in Imperial (BSW/BSF), and #8 to 2.1/4" in Unified (UNF/UNC) thread forms.

Nylon Insert Nuts
Trojan Special Fasteners Ltd is a leading UK manufacturer of precision nylon insert nuts, delivering bespoke fastening solutions across aerospace, automotive, marine, rail, and industrial engineering sectors. With decades of expertise in producing nylon insert lock nuts to exacting standards, we manufacture an extensive range of sizes in countless material and finish combinations.

Pre War Nuts
Trojan Special Fasteners specialises in manufacturing authentic pre-war BS190 nuts and railway stay nuts for heritage restoration projects, steam locomotives, vintage machinery, and industrial applications requiring historical accuracy. With over 50 years of experience in precision turning, we produce these specialist fasteners to exact historical specifications.

Round Nuts and Spacers
We manufacture a number of round nuts, which are not tightened by a wrench, but by hand. These are quite uncommon but we can make almost any combination of internal and external diameter you’re looking for within available material specifications and finishes.

Slotted & Castle Nuts
Castle nuts are typically hex nuts with usually 6 slots (60 degrees apart) in a reduced diameter round section above the wrenching part. When a castle nut (or any radially slotted nut) is applied to a threaded section, it is tightened so that it's slot is aligned with a predrilled hole in the bolt or threaded rod, into which a cotter pin, split pin, a lock wire or a spring pin is typically inserted to stop the nut from rotating.

• Special Nuts
• Spherical Seating Nuts
• Square Nuts
• Washers Spacer & Bosses
• Wheel Nuts