Made-to-order nickel aluminium bronze (NAB) and silicon aluminium bronze (SAB) fasteners for defence, naval, and offshore applications. If your drawing calls it out, we can make it.
Every fastener made to order against your drawing or specification. Metric and imperial, standard and non-standard — in NAB or SAB.
Full and part thread to DIN 933, ISO 4014, and customer drawings. Supplied with material cert and full traceability as standard.
M4 to M64 — larger on request
Standard, thick, and thin hex nuts to ISO 4032 / DIN 934. Matched to your bolt order or supplied separately against drawing.
M4 to M64 — all thread pitches
Double-ended studs for flanges, pressure vessels, and naval valve assemblies. Supplied to your specified thread form and length.
M8 to M52 — any length
Socket heads, countersunk, flange bolts, UNC/UNF imperial thread, left-hand thread — if you have a drawing, we can quote it.
Metric & imperial — send your drawing
Flat washers and spring washers in nickel aluminium bronze and silicon aluminium bronze. Supplied to drawing or standard dimensions to match your bolt order.
M4 to M64 — to suit bolt size
Hex socket (Allen) cap screws in NAB and SAB. Full thread and part thread to ISO 4762 and customer drawings. Material cert included as standard.
M4 to M36 — larger on request
Countersunk, pan head, and cheese head machine screws to DIN 963, DIN 85, DIN 84, and customer drawings. Slotted or cross-recess drive, material cert included.
M4 to M12 — larger on request
All-metal prevailing torque locking nuts — no nylon insert. Suitable for high-temperature and seawater applications where nylon-insert nuts are not appropriate.
M4 to M64 — metric and imperial
If you need something not shown here — an unusual thread form, a non-standard head type, or a fastener to a specific drawing — tell us what you need.
Upload a spreadsheet or PDF, or just type what you need. We'll come back with a price and lead time within 24 hours. No minimum order quantity.
Both materials offer outstanding corrosion resistance in seawater environments. Your drawing or specification will confirm which is required.
The primary material for seawater fasteners in naval and offshore applications. Exceptional resistance to seawater corrosion, biofouling, and cavitation erosion.
Higher machinability with excellent corrosion resistance. Preferred where tight tolerances are needed or for higher mechanical loading applications.
Defence and marine buyers search by spec number — and we supply to them. These standards are also referenced as DGS numbers in some procurement systems. Send us your drawing requirement and we'll confirm compliance.
UK MOD standard for NAB material in naval service. We supply fasteners with full material traceability to this standard.
Covers NAB wrought product for propulsion and hull systems — including fastener applications.
Silicon aluminium bronze (SAB) material standard. Heat treatment to DEF STAN 02-862 Part 2 Para 8.2.5. The SAB equivalent of NES 833.
Part-threaded hex bolt standard. Available in NAB and SAB, M4 to M64.
Full thread hex bolt standard. Available in all metric sizes M4 to M64 in NAB and SAB.
US equivalent NAB standard — required for export and US Navy supply chain projects. Available with ASTM certs.
Questions we get asked regularly by defence and marine procurement teams.
No minimum order quantity. No stock lists. Just send us what you need.
Drawing, part number, or spec reference — upload a file or type it in the box above.
Price, lead time, and material confirmation back to you fast. Usually same day for standard sizes.
Sourced from certified UK suppliers. Full material traceability included as standard.
Shipped with material test certificates, heat treatment records, and any QA documentation required.
Our fasteners go into environments where a corroded bolt isn't just a maintenance issue — it's a safety issue.
Supplying NAB fasteners to MOD contractors and tier-one defence supply chains. DEF STAN and NES compliance as standard.
Bronze fasteners for seawater systems, subsea equipment, and offshore platforms where steel would corrode rapidly.