M6 x 20mm button head socket screw in A4 marine grade stainless steel to ISO 7380-1. The wide, low-profile dome head distributes load across a larger bearing surface than a cap screw, ideal for furniture, signage, and decorative or thin-panel fixings. A4 (316) marine grade gives outstanding resistance to saltwater and chloride corrosion - the right choice for coastal, marine, and pool environments. Free next-day UK delivery on orders over £50.
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