Made-to-order nickel aluminium bronze bolts, nuts and stud bolts supplied to DEF STAN 02-833. Full material traceability, heat treatment certification, and QA documentation as standard. Proven supply into UK Royal Navy surface ship programmes.
DEF STAN 02-833 is the UK Ministry of Defence standard that specifies the material requirements for nickel aluminium bronze (NAB) used in naval and defence applications.
It defines the acceptable chemical composition, mechanical properties, and heat treatment requirements for NAB in both cast and wrought forms — covering components including bolts, nuts, stud bolts, valve bodies, pump housings, and propeller shaft components.
When a drawing specifies DEF STAN 02-833, it means the material must be verified against these requirements and supplied with full traceability documentation. For fasteners, this means material test certificates showing chemistry and mechanical properties, and heat treatment records where applicable.
The standard applies broadly across UK defence — submarines, surface ships, and land systems where seawater or corrosive environments are present. It is often referenced alongside NES 833 on Royal Navy surface ship drawings, particularly for legacy and refit programmes.
All fasteners sourced to order against your drawing or specification. Supplied with full material certification to satisfy MOD and prime contractor QA requirements.
Full and part thread to ISO 4014, DIN 933, and customer drawings. Full material traceability and cert pack included.
M4 to M64 — larger on request
Standard, thick and thin hex nuts to ISO 4032 / DIN 934. Matched to 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
Countersunk, pan head, and cheese head machine screws to DIN 963, DIN 85, DIN 84, and customer drawings. Full material traceability and cert pack included.
M4 to M12 — larger on request
Socket heads, countersunk, UNC/UNF imperial thread, left-hand thread. If you have a drawing, we can quote it.
Metric & imperial — send your drawing
DEF STAN 02-833 requires full material traceability. Every order is supplied with the documentation your QA team needs.
Chemical composition and mechanical properties verified against DEF STAN 02-833 requirements. Mill cert included as standard.
Time-temperature records supplied where heat treatment is specified. NAB heat treated to DEF STAN 02-862 Part 2 Para 8.2.4.
Every fastener traceable back to the original material heat. Batch records retained and available on request.
Conformance statement confirming supply to DEF STAN 02-833 specification, signed by our QA team.
Send us your drawing or spec reference and we'll come back with a price and lead time. No minimum order quantity.