{"product_id":"m4-stainless-steel-split-lock-washer-a2-din127-50-pack","title":"M4 Stainless Steel Split Lock Washer A2 DIN127 50-Pack","description":"\u003ch2\u003eM4 Stainless Steel Split Lock Washer — A2 DIN127, 50-Pack\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eM4 A2 stainless steel DIN127 split lock washers\u003c\/strong\u003e provide vibration-resistant fastening for M4 bolts and screws by using spring tension to maintain clamping force under vibration and dynamic loads. The split ring design bites into both the nut and the bearing surface, resisting rotation and preventing loosening in motor mounts, structural brackets, and industrial equipment fastening.\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\u003e4.1mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e7.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.0mm\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\u003eDIN127 \/ ISO 7090\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 Split Lock Washers?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring tension anti-loosening\u003c\/strong\u003e — split ring maintains clamping force as the joint settles under vibration and thermal cycling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBite-in anti-rotation\u003c\/strong\u003e — sharp split ends bite into nut and bearing surface, resisting rotation under vibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA2 stainless steel\u003c\/strong\u003e — corrosion-resistant; will not rust or weaken in electronics enclosures and outdoor equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN127 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\u003eNEMA 23 stepper motor mounting on CNC machines (vibration-prone, M4 mounting holes)\u003c\/li\u003e\n\u003cli\u003eAluminium extrusion bracket assembly in vibrating equipment\u003c\/li\u003e\n\u003cli\u003eRobotics actuator and servo bracket mounting (dynamic loads)\u003c\/li\u003e\n\u003cli\u003eIndustrial machinery and equipment fastening (vibration environment)\u003c\/li\u003e\n\u003cli\u003eElectronics enclosure panel mounting in vibrating equipment\u003c\/li\u003e\n\u003cli\u003eCNC machine axis and gantry structural assembly\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 and nyloc nuts\u003c\/li\u003e\n\u003cli\u003eM4 flat washers (use flat washer first, then split lock washer, then nut)\u003c\/li\u003e\n\u003cli\u003eInstallation order: surface → flat washer → split lock washer → nut\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e50× M4 A2 stainless steel DIN127 split lock washers\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What is the correct installation order for M4 split lock washers?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: Correct order from surface outward: (1) flat washer DIN125 against the surface, (2) split lock washer DIN127, (3) hex nut. The flat washer protects the surface; the split lock washer provides spring tension and bite-in anti-rotation between the nut and flat washer.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: Should I use split lock washers or nyloc nuts for NEMA 23 motor mounting?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: Both are effective. Split lock washers are reusable and allow easy adjustment; nyloc nuts provide more reliable anti-loosening for high-vibration applications. For CNC machine motor mounts subject to significant vibration, nyloc nuts are generally preferred. For lighter-duty applications, split lock washers are a practical and economical choice.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eQ: What is the thickness of an M4 split lock washer?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eA: M4 DIN127 split lock washer thickness is 1.0mm. This adds 1mm to the fastening stack height compared to a flat washer (0.8mm). Account for this when calculating total stack height in tight assemblies.\u003c\/dd\u003e\n\u003c\/dl\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":45673236529387,"sku":"","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/Machine-Split-Washer-M4-50-Pack.jpg?v=1723007616","url":"https:\/\/keszoox.com\/products\/m4-stainless-steel-split-lock-washer-a2-din127-50-pack","provider":"Keszoox","version":"1.0","type":"link"}