Black Stainless Steel Penny Washers Blackened Washer (10, M3 x 9mm)

BLACK PENNY WASHER M3 X 9MM — DIN 9021 FORM G WIDE-FORM Material: A2 stainless steel (304 grade, 18-8). Finish: chemical-black conversion coating, matt black appearance. Specification: DIN 9021 wide-form penny washer with outer diameter several times the nominal thread size. Alternative names: mudguard washer, fender washer, repair washer, timber washer, Form G washer, 3D washer. M3 X 9MM DIMENSIONS — DIN 9021 SPECIFICATION Inner diameter (ID): 3.2 mm (fits M3 thread). Outer diameter (OD): 9 mm. Thickness: 0.8 mm. Standards: DIN 9021 (Germany), ISO 7093 (international equivalent), UNI 6593 (Italy). Reference: A2 = 304 = 18-8 = X5CrNi18-10 (same material, multiple naming conventions). PACK OF 10 — TEN M3 X 9MM WASHERS Pack contents: 10 matching M3 x 9mm black penny washers. Material: A2 stainless steel (304 grade) with chemical-black finish. Variation options: this product is available in M3, M4, M5, M6, M8, M10 thread sizes, multiple outer diameters, in Pack of 10 or Pack of 20. Selection: use the variation drop-down at the top of this listing to choose your size and pack. APPLICATIONS — WIDE LOAD-SPREADING WASHER Use: spreads load over a wider area than DIN 125 plain washers; reduces pull-through on softer or oversized fixing holes. Materials commonly fastened: plywood, MDF, plasterboard, plastic, fibreglass, sheet metal, decking timber. Sectors: joinery, shopfitting, signage, decking, garden construction, automotive restoration, furniture assembly, DIY. A2 / 304 STAINLESS STEEL — MATERIAL GRADE SELECTION GUIDE A2 / 304: indoor, sheltered outdoor, garden, automotive, general DIY use. A4 / 316 (separate listing): permanently submerged, coastal-marine, salt-spray, swimming pool, chemical exposure environments. Note: for permanently submerged or salt-exposed installations, please choose the A4 / 316 marine-grade variant of this product where available in our store.