{"product_id":"penny-washers-stainless-steel","title":"Penny \/ Mudguard Washers M3–M10 — A4 Marine 316 DIN 9021","description":"\u003ch3\u003eWhy choose these Penny \/ Mudguard Washers\u003c\/h3\u003e\n\u003cp\u003eOur Penny \/ Mudguard Washers are pressed from A4 (316) marine grade stainless steel to DIN 9021 — the European standard for large-OD flat washers, also known as penny washers, repair washers or mudguard washers. The oversized outside diameter (typically two to three times the bolt diameter) spreads load over a much wider area than a standard form A washer, which makes them ideal for soft timber, plastic, sheet metal, oversized clearance holes, or repairing holes that have been enlarged or worn. A4-316 stainless gives superior chloride and salt-spray resistance — the right choice for marine, coastal and outdoor use.\u003c\/p\u003e\n\u003ch3\u003eSizes available\u003c\/h3\u003e\n\u003cp\u003eEach washer is specified by bolt size × outside diameter. Use the variation selector to choose the exact combination you need:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eM3 — 9mm or 12mm OD\u003c\/li\u003e\n\u003cli\u003eM4 — 12mm, 16mm, 20mm or 25mm OD\u003c\/li\u003e\n\u003cli\u003eM5 — 15mm, 20mm or 25mm OD\u003c\/li\u003e\n\u003cli\u003eM6 — 18mm, 24mm or 30mm OD\u003c\/li\u003e\n\u003cli\u003eM7 — 22mm OD\u003c\/li\u003e\n\u003cli\u003eM8 — 24mm or 32mm OD\u003c\/li\u003e\n\u003cli\u003eM10 — 25mm, 30mm or 40mm OD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePack options\u003c\/h3\u003e\n\u003cp\u003eEach variant is available in packs of 10 or 20.\u003c\/p\u003e\n\u003ch3\u003eTypical uses\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSpreading bolt load on softwood decking, fence posts, sheds and timber frames\u003c\/li\u003e\n\u003cli\u003eMarine deck and trailer fittings where chloride exposure rules out plain steel\u003c\/li\u003e\n\u003cli\u003eMudguards, splashguards and vehicle body panels — the original “mudguard washer” application\u003c\/li\u003e\n\u003cli\u003eRepairing or reinforcing enlarged, worn or oversized clearance holes in sheet metal or panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to fit\u003c\/h3\u003e\n\u003cp\u003ePlace the penny washer between the work surface and the head of the bolt (or under the nut) before tightening, ensuring the bolt sits centrally in the washer’s clearance hole. Use one washer per bolt face — combining two undersized washers is not a substitute for a correctly sized penny washer. For long-term outdoor use, pair with A4 stainless bolts and nuts to avoid galvanic corrosion.\u003c\/p\u003e\n\u003ch3\u003eDelivery\u003c\/h3\u003e\n\u003cp\u003eSame-day dispatch on orders placed before 2pm, Monday to Friday. Free UK delivery on orders over £20. Tracked options available at checkout.\u003c\/p\u003e","brand":"Universal Hardware","offers":[{"title":"10 Units \/ M3 x 9mm","offer_id":54688976634193,"sku":"FAS-PENNYWASH-A4-10-UNITS-M3-X-9MM","price":3.5,"currency_code":"GBP","in_stock":true},{"title":"20 Units \/ M3 x 9mm","offer_id":54688976666961,"sku":"FAS-PENNYWASH-A4-20-UNITS-M3-X-9MM","price":3.95,"currency_code":"GBP","in_stock":true},{"title":"10 Units \/ M3 x 12","offer_id":54688976699729,"sku":"FAS-PENNYWASH-A4-10-UNITS-M3-X-12","price":3.5,"currency_code":"GBP","in_stock":true},{"title":"20 Units \/ M3 x 12","offer_id":54688976732497,"sku":"FAS-PENNYWASH-A4-20-UNITS-M3-X-12","price":3.95,"currency_code":"GBP","in_stock":true},{"title":"10 Units \/ M4 x 12","offer_id":54688976765265,"sku":"FAS-PENNYWASH-A4-10-UNITS-M4-X-12","price":3.5,"currency_code":"GBP","in_stock":true},{"title":"20 Units \/ M4 x 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