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In stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockOnly 3 units leftIn stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockIn stockOnly 4 units leftIn stockOnly 3 units leftOut of stockIn stockOut of stockOnly 2 units leftOut of stockOut of stockOut of stock
Pickup available at Arthur Beale Warehouse
Usually ready in 2 hours
Stainless Steel Slotted Machine Screw
PAN / 4mm x 25mm
Arthur Beale Warehouse
Pickup available, usually ready in 2 hours
Severalles Farm Ilmer Princes Risborough HP27 9QZ United Kingdom
These machine screws are made from A4 (AISI 316 grade) stainless steel.
The most common grades are AISI 316 (A4) and AISI 304 (A2). Generally, onboard we select A4 because it has the greatest corrosion resistance. However, it is weaker than A2 which is generally selected for architectural work.
The corrosion resistance of stainless steel relies on the surface oxidation. If air is not present the oxidation can not take place. For this reason, bolts made from stainless steel passing through damp timber can be prone to severe corrosion and are best avoided. Another problem with stainless steel is its tendency to cold weld. A bolt made of stainless steel can suddenly seize up. Don’t apply more welly, because once the threads have seized you have had it, and the fastening will need replacing.
Applying a little Lanoguard to the thread before assembly will help prevent "cold welding". Do NOT apply Lanoguard, or any grease, if you are tightening to a specific torque as the grease will affect the torque setting.
We are one of the United Kingdoms oldest chandlers, tracing our history back 500 years. We have supplied all sorts of exciting expeditions in our long history, including early Everest and Arctic Expeditions for Ernest Shackleton, Gino Watkins and many more.
We pride ourselves on our passion and dedication for high quality kit for every adventure.
