{"product_id":"m4-stainless-steel-flat-washer-a2-din125-50-pack","title":"M4 Stainless Steel Flat Washer A2 DIN125 50-Pack","description":"\u003ch2\u003eM4 Stainless Steel Flat Washer — A2 DIN125, 50-Pack\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eM4 A2 stainless steel DIN125 flat washers\u003c\/strong\u003e distribute the clamping load of M4 screws and bolts over a larger surface area, preventing pull-through in soft materials, protecting surface finishes, and providing a smooth bearing surface for nut tightening. The larger M4 washer is essential for structural bracket assembly, aluminium extrusion mounting, and any application where M4 clamping force would damage the substrate without load distribution.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Size (fits)\u003c\/td\u003e\n\u003ctd\u003eM4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e4.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eA2 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003ctd\u003eDIN125 \/ ISO 7089\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e50pcs per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhy Choose M4 A2 Stainless Flat Washers?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad distribution\u003c\/strong\u003e — 9mm OD spreads M4 clamping force over a larger area; prevents pull-through in plastic panels, thin sheet metal, and soft materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface protection\u003c\/strong\u003e — smooth washer face protects anodised aluminium, painted surfaces, and plastic from M4 screw head damage during tightening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA2 stainless steel\u003c\/strong\u003e — corrosion-resistant; will not rust or stain electronics enclosures and outdoor equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN125 standard\u003c\/strong\u003e — internationally specified; compatible with all M4 screws, bolts, and nuts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e50-pack quantity\u003c\/strong\u003e — practical workshop stock for prototyping and production\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eTypical Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAluminium extrusion bracket and corner bracket assembly (M4 bolt + washer)\u003c\/li\u003e\n\u003cli\u003eElectronics enclosure panel mounting with M4 bolts\u003c\/li\u003e\n\u003cli\u003eRobotics chassis and structural bracket assembly\u003c\/li\u003e\n\u003cli\u003eCNC machine axis and gantry structural assembly\u003c\/li\u003e\n\u003cli\u003eNEMA 23 stepper motor mounting (M4 mounting holes)\u003c\/li\u003e\n\u003cli\u003eIndustrial equipment panel and bracket mounting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible With\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eAll M4 machine screws, cap screws, and bolts\u003c\/li\u003e\n\u003cli\u003eM4 hex nuts, nyloc nuts, and flange lock nuts\u003c\/li\u003e\n\u003cli\u003eM4 split lock washers (used together for vibration resistance)\u003c\/li\u003e\n\u003cli\u003eM4 T-slot bolts for aluminium extrusion assembly\u003c\/li\u003e\n\u003cli\u003e9mm OD fits standard M4 counterbore dimensions\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e50× M4 A2 stainless steel DIN125 flat washers\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What is the outer diameter of an M4 flat washer?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: M4 DIN125 flat washer OD is 9mm, ID is 4.3mm, thickness is 0.8mm. These are standard dimensions compatible with all M4 screws and bolts.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Do I need a flat washer for aluminium extrusion T-slot assembly?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: A flat washer is recommended under the bolt head when mounting brackets to aluminium extrusion, especially for anodised extrusion where the bolt head could damage the anodised surface. It also helps distribute the clamping load across the bracket face.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Can I use M4 flat washers with M3 screws?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: No. M4 flat washers have a 4.3mm ID which is too large for M3 screws (3mm diameter). The washer would not be retained by the M3 screw head. Always match the washer size to the screw size.\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":45673235382507,"sku":"","price":14.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/Machine-Flat-Washer-M4-50-Pack.jpg?v=1723007619","url":"https:\/\/keszoox.com\/products\/m4-stainless-steel-flat-washer-a2-din125-50-pack","provider":"Keszoox","version":"1.0","type":"link"}