Sea Screw Ltd
Marine Hardware and Fixings
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Detailed below are the abbreviations used throughout the website in the product descriptions along with some other pertinent product information.

All Fixing & Rigging Products are Stainless Steel Unless Stated Otherwise.

ABBREVIATION   FULL TERM
A2  

304 S15 Stainless Steel

A4  

316 S12 Stainless Steel

NP  

Nickel Plated

NPB  

Nickel Plate on Brass

COB  

Chrome on Brass

Ny  

Nylon

Gav  

Galvanized

mm  

Millimeters

M  

Metric Thread Size

Dia  

Diameter

Wt  

Width

Ht  

Height

O.A.L  

Over All Length


A2 304 Stainless Steel

A good resistance to corrosion, Except in severe industrial & marine conditions this specification has resistance up to 850°C & its ability to resist organic acids is satisfactory chlorides & is non-magnetic except when heavily cold worked. Uses: Outside work & Inside Boats (Not Recommended on decks)

A4, 316 Stainless Steel

This specification has a greater corrosion resistance than A2 304 S15 in certain environments, and is often used in Marine applications. The material is hardened during the cold working process. Non-magnetic except when heavily cold worked Uses: On Deck and any area where sea water or sea spray plays a part.
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Sea Screw Ltd. 4 Churchdale Road, Eastbourne, East Sussex. BN22 8PS.