{"product_id":"solid-black-finishing-washers","title":"Black Finishing Cup Washers M3–M8 — A4 Marine Stainless","description":"\u003ch3\u003eWhy choose these black finishing cup washers\u003c\/h3\u003e\n\u003cp\u003eThese countersunk cup washers combine a decorative chemical-black finish with the corrosion resistance of A4 marine grade stainless steel — ideal where you want the screw head to sit flush within a clean, dark-finished seat. The cupped profile spreads load around the countersunk fixing while concealing the bore, giving a tidy professional finish on cabinetry, marine trim, signage and outdoor joinery.\u003c\/p\u003e\n\u003ch3\u003eSizes available\u003c\/h3\u003e\n\u003cp\u003eStocked in five common metric bore sizes to suit standard countersunk machine screws and woodscrews: M3, M4, M5, M6 and M8. Each washer is precision pressed from A4 (316) stainless steel and chemically blackened for an even matte finish that resists chipping and weathering.\u003c\/p\u003e\n\u003ch3\u003ePack options\u003c\/h3\u003e\n\u003cp\u003eChoose a single washer sample, a pack of 10 for small jobs, or a pack of 20 for larger installations. Mixed sizes can be ordered in the same checkout to qualify for free UK delivery on orders over £20.\u003c\/p\u003e\n\u003ch3\u003eTypical uses\u003c\/h3\u003e\n\u003cp\u003eBoat fit-outs and cabin joinery, outdoor furniture, dark-finished kitchen and wardrobe handles, signage, security-screw concealment, audio and AV brackets, electrical face-plate trims, and any application where a stainless steel washer is needed but a bright finish would clash with black hardware.\u003c\/p\u003e\n\u003ch3\u003eHow to fit\u003c\/h3\u003e\n\u003cp\u003eDrill or counterbore so the cup sits flush with the surface, drop the washer in place, then drive a matching countersunk-head screw through the bore. The cup profile centres the screw automatically and provides a finished seat that hides any minor over-drilling. Pair with black A4 stainless socket or countersunk screws for a fully colour-matched fixing.\u003c\/p\u003e\n\u003ch3\u003eDelivery\u003c\/h3\u003e\n\u003cp\u003eSame-day dispatch on orders placed before 2pm — free UK delivery on orders over £20.\u003c\/p\u003e","brand":"Universal Hardware","offers":[{"title":"10 Units \/ M3","offer_id":54688988594513,"sku":"FAS-FINWASHCUP-A4-BLK-10-UNITS-M3","price":4.95,"currency_code":"GBP","in_stock":true},{"title":"20 Units \/ M3","offer_id":54688988627281,"sku":"FAS-FINWASHCUP-A4-BLK-20-UNITS-M3","price":6.95,"currency_code":"GBP","in_stock":true},{"title":"10 Units \/ M4","offer_id":54688988692817,"sku":"FAS-FINWASHCUP-A4-BLK-10-UNITS-M4","price":6.95,"currency_code":"GBP","in_stock":true},{"title":"20 Units \/ M4","offer_id":54688988725585,"sku":"FAS-FINWASHCUP-A4-BLK-20-UNITS-M4","price":8.95,"currency_code":"GBP","in_stock":true},{"title":"10 Units \/ M8","offer_id":54688988791121,"sku":"FAS-FINWASHCUP-A4-BLK-10-UNITS-M8","price":13.95,"currency_code":"GBP","in_stock":true},{"title":"20 Units \/ M8","offer_id":54688988823889,"sku":"FAS-FINWASHCUP-A4-BLK-20-UNITS-M8","price":20.45,"currency_code":"GBP","in_stock":true},{"title":"10 Units \/ M5","offer_id":54688988889425,"sku":"FAS-FINWASHCUP-A4-BLK-10-UNITS-M5","price":5.95,"currency_code":"GBP","in_stock":true},{"title":"20 Units \/ M5","offer_id":54688988922193,"sku":"FAS-FINWASHCUP-A4-BLK-20-UNITS-M5","price":9.25,"currency_code":"GBP","in_stock":true},{"title":"10 Units \/ M6","offer_id":54688988987729,"sku":"FAS-FINWASHCUP-A4-BLK-10-UNITS-M6","price":6.95,"currency_code":"GBP","in_stock":true},{"title":"20 Units \/ M6","offer_id":54688989020497,"sku":"FAS-FINWASHCUP-A4-BLK-20-UNITS-M6","price":9.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1073\/9381\/0769\/files\/Black-finishing-washers1-scaled.jpg?v=1787675025","url":"https:\/\/www.universal-hardware.co.uk\/products\/solid-black-finishing-washers","provider":"Universal Hardware","version":"1.0","type":"link"}