{"product_id":"lasbricka-tandad-a2","title":"External tooth lock washer | A2 | DIN 6798","description":"\u003cp\u003eDo you need a lock washer that works reliably in both indoor and outdoor environments? \u003cstrong\u003eExternal tooth lock washer A2 DIN 6798 AZ\u003c\/strong\u003e in stainless steel (A2 \/ AISI 304) is developed to provide reliable locking action and a long service life. The radially placed teeth grip into the substrate or the contact surface of the nut, creating effective friction that prevents the assembly from loosening due to vibrations and movement.\u003c\/p\u003e\n\u003ch2\u003eAPPLICATION AREA\u003c\/h2\u003e\n\u003cp\u003ePerfect for fastenings where vibration protection is required in \u003cstrong\u003econstruction, machine engineering, industrial installations, and outdoor use\u003c\/strong\u003e. The toothed design makes the lock washer easy to install and provides a stable, self-locking connection without additional locking elements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWatch video:\u003c\/strong\u003e \u003ca href=\"https:\/\/youtube.com\/shorts\/9T4NSSIyFeM\" target=\"_blank\" rel=\"noopener\"\u003eWhich washer should you choose?\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eTECHNICAL SPECIFICATIONS\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eProduct type:\u003c\/strong\u003e External tooth lock washer\u003cbr\u003e\u003cstrong\u003eStandard:\u003c\/strong\u003e DIN 6798 AZ\u003cbr\u003e\u003cstrong\u003eQuality:\u003c\/strong\u003e A2 \/ AISI 304 (stainless steel)\u003cbr\u003e\u003cstrong\u003eMaterial grade:\u003c\/strong\u003e Not specified (stainless steel without strength class)\u003cbr\u003e\u003cstrong\u003eThread type:\u003c\/strong\u003e Not applicable\u003cbr\u003e\u003cstrong\u003eSurface treatment:\u003c\/strong\u003e Untreated (natural stainless steel)\u003cbr\u003e\u003cstrong\u003eHead shape:\u003c\/strong\u003e Not applicable\u003cbr\u003e\u003cstrong\u003eDrive type:\u003c\/strong\u003e Not applicable\u003c\/p\u003e\n\u003ch2\u003eFREQUENTLY ASKED QUESTIONS (FAQ)\u003c\/h2\u003e\n\u003ch3\u003eWhat is an external tooth lock washer (DIN 6798 Form AZ) and how does it work?\u003c\/h3\u003e\n\u003cp\u003eAn \u003cb\u003eexternal tooth lock washer\u003c\/b\u003e (DIN 6798 Form AZ) is a spring-type locking washer for screw joints exposed to movement or low\/moderate vibration:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eToothed grip (\u003ci\u003eForm AZ\u003c\/i\u003e):\u003c\/b\u003e The washer's external teeth are angled and placed along the outer circumference. When tightened, the teeth spring together and dig slightly into both the contact surface of the screw head\/nut and the underlying material.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eFriction and spring force:\u003c\/b\u003e The combination of the teeth's mechanical grip and the integrated spring tension prevents the screw or nut from loosening during minor vibrations.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eElectrical contact\/grounding:\u003c\/b\u003e By cutting through thin oxide layers, paint, or surface treatments, the teeth also create very good electrical contact, making the washer popular for grounding terminals and electronics assembly.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eWhy is stainless steel A2 (AISI 304) suitable for this lock washer?\u003c\/h3\u003e\n\u003cp\u003eA2 steel (1.4301 \/ AISI 304) provides an excellent balance between corrosion protection and mechanical spring capability:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eWithstands outdoor environments:\u003c\/b\u003e Endures rain, snow, humidity, and damp indoor environments without suffering from rust or performance degradation (Corrosivity category C3).\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eRetains tension:\u003c\/b\u003e The stainless material maintains its spring properties over time without becoming brittle.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eIn highly corrosive\/marine environments:\u003c\/b\u003e If the lock washer is to be submerged in salt water, exposed to road salt, or heavy chemicals, acid-proof steel A4 or wedge-locking washers (e.g., Nord-Lock) are recommended instead.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eWhat should be considered when installing toothed A2 washers?\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003ePair with stainless screws:\u003c\/b\u003e Install the A2 lock washer together with stainless A2 or A4 screws and nuts to completely avoid galvanic corrosion.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSurface sensitivity:\u003c\/b\u003e Since the teeth grip into the substrate, small marks are made on the contact surface. Do not use toothed washers on delicate, softer surfaces where scratches are not permitted or where the corrosion protection (e.g., a thick paint coating) must not be breached.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eUsed for moderate vibrations:\u003c\/b\u003e For extremely heavy vibrations, dynamic impacts, or cyclic loads, mechanical wedge-locking washers or nyloc nuts are recommended, as toothed washers function best as spring-loaded friction locking in light to medium-duty assemblies.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ol\u003e","brand":"WASI","offers":[{"title":"M5","offer_id":49583703818582,"sku":"101344","price":0.25,"currency_code":"SEK","in_stock":true},{"title":"M6","offer_id":48108887146838,"sku":"100885","price":0.3,"currency_code":"SEK","in_stock":true},{"title":"M8","offer_id":48108887179606,"sku":"100886","price":0.4,"currency_code":"SEK","in_stock":true},{"title":"M10","offer_id":48108887212374,"sku":"101222","price":0.55,"currency_code":"SEK","in_stock":true},{"title":"M12","offer_id":48108887245142,"sku":"100887","price":0.7,"currency_code":"SEK","in_stock":true},{"title":"M14","offer_id":48108887277910,"sku":"100888","price":1.2,"currency_code":"SEK","in_stock":true},{"title":"M16","offer_id":48108887310678,"sku":"100889","price":1.3,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0776\/7864\/1494\/files\/rostfri-nu-tandad-lasbricka-a2.jpg?v=1786180828","url":"https:\/\/rostfri.nu\/en\/products\/lasbricka-tandad-a2","provider":"Rostfri.nu","version":"1.0","type":"link"}