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Brass.Stainless steel and Marine
EXOTIC FASTENERS

Exotic Fasteners are manufactured using exotic materials and alloys to produce Superior Bolts and Nuts and a variety of high-performance fasteners. Fasteners can be produced by hot forging and CNC precision machining from exotic materials, producing fasteners of high integrity.

Fastener product manufacturing ranges include Hexagon Head Bolts, Socket Head Capscrews (Allen screws), Engineers Studs, Hexagon Nuts, Cup Square Bolts, Nib Bolts, Nuts and other specialised fasteners.

These unusual bolts and nuts are designed to fasten materials that need to perform in extreme circumstances. Pressure extremes, and resistant to corrosion are only two of many reasons to have a fastener specially produced.


 
STAINLESS STEEL FASTENERS
HAINA
APEX
TAPPEX
MARINE and SHIPBUILDING
J Cooke providing fastener products for marine applications considers manufacturing materials suitable for saltwater environments; stainless steel in both A2 and A4 also Brass. Fastener coating also plays a part. Modern zinc flake and plastic coatings, finishes with high salt spray performance are complemented by the traditional Cadmium coating. 
J COOKE
  • Whether for Commercial, Rescue,  Leisure or submersible-craft, Tappex®provide high-quality fastening solutions, backed up by extensive & 'in-house' technical knowledge to meet the application demands for the vessels interiors, structure or external-mounted equipment used on Oceans, Rivers or Canals.
 
TAPPEX
BRASS
Mason Fasteners provide Brass fastener products for marine applications. Standard product off the shelf or bespoke special fasteners and turned parts to drawing. To complement the full brass range Masons stock and produce steel and stainless steel parts.
MASON
NON STANDARD STAINLESS STEEL
Thread Galling
DEFINITIONS
STANDARDS
COMPARE
SUPPLY TYPE
Galvanic Corrosion
KNOWLEDGE
DIMENSIONS

Class  A2    USA Grade  304

Grade A2 is an Austenitic grade of stainless steel, it has excellent resistance to atmospheric corrosion except in severe marine and industrial environments.

Oxidation resistance is satisfactory for use up to 850ºC. Resistance to nitric acid and other oxidising chemicals is excellent.

Resistance to other mineral and organic acids is good within limits of temperature and concentration. Generally unsuitable for solutions of hydrochloric acid and chlorides, particularly if evaporation at high temperatures occurs. 

This grade can be described as non-magnetic except when heavily cold worked. It is not hardenable by heat treatment, but is greatly strengthened by cold working. High strength and toughness at sub-zero temperatures down to minus 250ºC.

Significant stress relaxation above 575ºC. 

Applications

Civil and chemical engineering food processing, medical and brewing equipment and many types of domestic appliances, Cryogenic equipment, special purpose building and masonry fixings. 

Class  A4    USA Grade  316  F593

Grade A4 is also an Austenitic grade of stainless steel, it has a higher corrosion resistance than A2 grade in many chemical environments, including contact with dilute sulphuric acid, and acetic acid over a wide range of temperature and concentration. Resistance to atmospheric staining and pitting in industrial and urban areas, and also is suitable for marine conditions but not immersed in sea water.

Oxidation resistance is satisfactory for use up to 800ºC. Resistance to nitric acid and other oxidising chemicals is excellent. Resistance to other mineral and organic acids is good within certain limits of temperature and concentration. Generally unsuitable for solutions of hydrochloric acid and chlorides, particularly if evaporation at high temperatures occurs. Satisfactory oxidation resistance up to 800ºC.

Significant stress relaxation above 600ºC. 

Applications

Fasteners for boat deck fittings, chemical plant, swimming pools, dye vats, fertiliser, rayon and sewage treatment plants. Dairy equipment. Medical sterilising equipment. 

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Fastener product-specific information, fastener drawings and relevant fastener data, marketed from one of the most extensive fastener supply and fastening user databases. Fastener source of supply, specific to fastener products and fastener supply categories.
Comprehensive database of all fastener, fixings and fastenings data, fastener information, related fastener dimensional tables and detailed drawings of fasteners. Fastener standards and fastener non-standards, every piece of fastener data you will need. Fastener companies are adding their own unique fastener products to the fastener data website, the fastener site is growing daily. Fasteners consist of hexagon Bolts and bolts with various heads, Socket head screws Allen type, a diverse range of screws and the washers and nuts to go with them. Threads range from BSF British standard fine thread and BSW British standard Whitworth to American UNC and UNF threads; not to forget Metric threads in coarse, fine and extra fine threads. Fasteners are produced by cold forging, hot forging and bright turning. fasteners are not restricted to threaded bolts and screw, they extend to rivets, circlips, dowels and other pins.
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