Industries · Ship building and marine
Marine fasteners for ship building and repair
HAGUE FASTENERS makes marine fasteners to order: headed turned fasteners, studs, pins and complex CNC milled components in bronzes, cupro nickel, naval brass, stainless and duplex steels, made in our Willenhall facility for naval and commercial vessels.
70/30
And 90/10 cupro nickel
3.2
EN 10204 certificates with third-party witnessing
Non-magnetic
Bronzes and austenitic stainless grades
1 to 500
One-off repairs to new build batches
Seawater changes everything
The right metal for every part of the hull
Some of our most complex CNC turned and milled components have gone into ship building. HAGUE FASTENERS makes marine fasteners in the UK, from special milled components and unthreaded pins to a full range of headed turned fasteners in materials suited to seawater.
At sea the fastener material matters as much as its strength. Seawater attacks ordinary steels, and two dissimilar metals in contact can set up galvanic corrosion, so the bolt must be chosen to suit the parts it joins. That is why copper alloys, cupro nickel and duplex steels are so widely used on ships.
Where our fasteners go
- Naval construction
- Submersible watercraft
- Midget submarine and wet sub construction
- Ship maintenance, refurbishment and repair
- Dry dock and shipyard maintenance
- Ship breaking
- Marine crane manufacturers and repairers
Materials
Marine grades we machine
See non-ferrous materials for bronze and cupro nickel grades. The grade supplied always follows your specification.
| Group | Grades |
|---|---|
| Copper alloys | Copper, naval brass, brass CZ121, silicon bronze UNS C65500, phosphor bronze |
| Aluminium bronzes | Aluminium bronze CA104, NES 833 and others, C63000 |
| Cupro nickel and other non-ferrous | Cupro nickel 70/30 and 90/10, Hiduron 191, Marinel, aluminium |
| Stainless steels | AISI 303, 304 (including class 70), 316 (including class 80), 310 and 321 |
| Higher alloys | 904L (Uranus B6), Carpenter 20 (CB20), Carpenter MP35N, duplex and super duplex |
| Alloy steel | EN26, for high strength machinery fasteners |
Products
Marine fasteners we make
Hexagon bolts
Hex bolts in bronze, stainless and duplex.
Engineer studs
Engineer and double-ended studs.
Pins
Clevis pins, cotter pins and unthreaded pins.
U and J bolts
For pipework and fittings.
Heavy hex nuts
Matched to studs and allthread studding.
Spherical washers
Convex and concave washer sets.
Milled components
Complex CNC milled parts to drawing.
Round nuts
Special nuts with spanner holes.
Independent inspection
Witnessed by the inspector you choose
Shipbuilders, naval programmes and marine crane makers often ask for third-party witnessed test certificates, such as EN 10204 3.2, issued with an independent classification society or accredited inspection body. We build the hold and witness points into the Inspection and Test Plan from the start.
- EN 10204 3.1 and 3.2 certificates
- Independent UKAS-accredited testing
- Controlled, traceable supply for defence work
- Secure handling of drawings under Cyber Essentials
Questions
Frequently asked questions
What are the best marine fasteners for seawater?
It depends on the parts being joined. Aluminium bronze, silicon bronze and cupro nickel are traditional choices; super duplex and 316 stainless are used where higher strength is needed. Matching the metals avoids galvanic corrosion.
Why not use ordinary stainless steel bolts on a ship?
Grades such as 304 can pit and crevice corrode in seawater, and stainless bolts in bronze or aluminium parts can cause galvanic corrosion. The grade should suit the location and the parts around it.
Can you supply non-magnetic fasteners?
Yes. Bronzes, copper alloys and austenitic stainless steels are used where low magnetic permeability is required.
Do you supply 3.2 certificates witnessed by a classification society?
Yes. We arrange EN 10204 3.2 certification with the independent inspector your contract names.
Ship building or repair?
Send us the drawing or sample
Tell us the grade, sizes, quantity and inspection requirements and we will quote quickly.