{"product_id":"sparskruv-med-stort-huvud-a1-din-921","title":"Slotted screw with pan head | Large head | A1 | DIN 921","description":"\u003cp\u003e\u003cstrong\u003eSlotted flat head screw in stainless steel A1\u003c\/strong\u003e (AISI 303 \/ 1.4305) according to DIN 921 features an extra-large, low head with a straight slot and is intended for mechanical fastening where a large contact surface is required. The wide head distributes the load over a larger area against the fastened component.\u003c\/p\u003e\n\u003cp\u003eThe large screw head provides a wide contact surface and, in some applications, may reduce the need for a separate plain washer. This design is particularly useful when the load needs to be distributed over a larger area or when a smaller screw head does not provide sufficient contact area.\u003c\/p\u003e\n\u003ch2\u003eSAME PRODUCT FAMILY: SLOTTED FLAT HEAD SCREW\u003c\/h2\u003e\n\u003cp\u003eDIN 921 and DIN 923 are two versions of the same product family, slotted flat head screw (German: Flachkopfschraube mit Schlitz). DIN 921 has an extra-large head for a large contact surface. DIN 923, on the other hand, has an unthreaded shoulder under the head (shoulder screw). If you need a slotted screw with a shoulder, see \u003ca href=\"\/en\/products\/sparskruv-med-krage-a1-din-923\"\u003eSlotted flat head screw | With shoulder | A1 | DIN 923\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eAREA OF APPLICATION\u003c\/h2\u003e\n\u003cp\u003eDIN 921 is used for mechanical fastenings where a large and low screw head is suitable. The large contact surface can be advantageous when fastening components where the load needs to be distributed over a larger area. Stainless steel A1 provides corrosion resistance for environments and applications where this material grade is suitable.\u003c\/p\u003e\n\u003ch2\u003eTECHNICAL SPECIFICATIONS\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eProduct type:\u003c\/strong\u003e Screw\u003cbr\u003e\u003cstrong\u003eProduct family:\u003c\/strong\u003e Slotted flat head screw (DIN 921 \/ DIN 923)\u003cbr\u003e\u003cstrong\u003eAlso known as:\u003c\/strong\u003e Slotted screw, slotted machine screw, slotted flat head screw\u003cbr\u003e\u003cstrong\u003eHead shape:\u003c\/strong\u003e Flat head, large head\u003cbr\u003e\u003cstrong\u003eMaterial grade:\u003c\/strong\u003e A1 (AISI 303 \/ 1.4305)\u003cbr\u003e\u003cstrong\u003eStandard:\u003c\/strong\u003e DIN 921\u003cbr\u003e\u003cstrong\u003eThread type:\u003c\/strong\u003e Metric thread\u003cbr\u003e\u003cstrong\u003eDrive type:\u003c\/strong\u003e Slotted\u003cbr\u003e\u003cstrong\u003eDelivery unit:\u003c\/strong\u003e Piece\u003c\/p\u003e\n\u003ch2\u003eFREQUENTLY ASKED QUESTIONS (FAQ)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is DIN 921?\u003c\/strong\u003e\u003cbr\u003eDIN 921 is a standard for slotted screws with a flat, large head. The wide head provides a large contact surface against the fastened component and distinguishes this version from slotted screws with smaller heads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between DIN 921 and DIN 923?\u003c\/strong\u003e\u003cbr\u003eBoth are slotted flat head screws and belong to the same product family. DIN 921 has an extra-large head for a large contact surface. DIN 923 has an unthreaded shoulder under the head and is used when a smooth surface for guidance or centering is required. See \u003ca href=\"\/en\/products\/sparskruv-med-krage-a1-din-923\"\u003eslotted shoulder screw DIN 923\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs a washer required for DIN 921?\u003c\/strong\u003e\u003cbr\u003eNot always. The large head itself provides a wide contact surface and may therefore reduce the need for a separate plain washer in some applications. A washer may still be required depending on the surface, load, and the requirements of the construction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does DIN 921 have a large head?\u003c\/strong\u003e\u003cbr\u003eThe large head increases the contact surface against the fastened part, allowing the load to be distributed over a larger area. This can be beneficial when fastening against materials or components where a smaller contact area is unsuitable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat thread type does DIN 921 have?\u003c\/strong\u003e\u003cbr\u003eDIN 921 has a metric thread and is used together with a corresponding metric internal thread or suitable nut.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does stainless steel A1 mean?\u003c\/strong\u003e\u003cbr\u003eA1 is a material grade for stainless steel (austenitic, corresponding to 1.4305 \/ AISI 303). The choice of A1 should be made based on the specific environment and the corrosion resistance requirements applicable to the installation.\u003c\/p\u003e","brand":"WASI","offers":[{"title":"M3 \/ 5","offer_id":55300164550998,"sku":"104058","price":3.1,"currency_code":"SEK","in_stock":false},{"title":"M3 \/ 6","offer_id":55300164583766,"sku":"104059","price":2.9,"currency_code":"SEK","in_stock":false},{"title":"M3 \/ 8","offer_id":55300164616534,"sku":"104060","price":3.2,"currency_code":"SEK","in_stock":false},{"title":"M3 \/ 12","offer_id":55300164682070,"sku":"104061","price":6.6,"currency_code":"SEK","in_stock":true},{"title":"M4 \/ 5","offer_id":55300164845910,"sku":"104062","price":4.2,"currency_code":"SEK","in_stock":false},{"title":"M4 \/ 6","offer_id":55300164878678,"sku":"104063","price":4.25,"currency_code":"SEK","in_stock":false},{"title":"M4 \/ 8","offer_id":55300164911446,"sku":"104064","price":4.5,"currency_code":"SEK","in_stock":false},{"title":"M4 \/ 10","offer_id":55300164944214,"sku":"104065","price":5.0,"currency_code":"SEK","in_stock":false},{"title":"M4 \/ 12","offer_id":55300164976982,"sku":"104066","price":6.5,"currency_code":"SEK","in_stock":false},{"title":"M5 \/ 6","offer_id":55300165173590,"sku":"104067","price":6.25,"currency_code":"SEK","in_stock":false},{"title":"M5 \/ 8","offer_id":55300165206358,"sku":"104068","price":7.3,"currency_code":"SEK","in_stock":false},{"title":"M5 \/ 10","offer_id":55300165239126,"sku":"104069","price":9.0,"currency_code":"SEK","in_stock":false},{"title":"M5 \/ 12","offer_id":55300165271894,"sku":"104070","price":10.5,"currency_code":"SEK","in_stock":false},{"title":"M5 \/ 16","offer_id":55300165304662,"sku":"104071","price":10.6,"currency_code":"SEK","in_stock":false},{"title":"M6 \/ 10","offer_id":55300165534038,"sku":"104072","price":9.9,"currency_code":"SEK","in_stock":false},{"title":"M6 \/ 12","offer_id":55300165566806,"sku":"104073","price":10.6,"currency_code":"SEK","in_stock":false},{"title":"M6 \/ 16","offer_id":55300165599574,"sku":"104074","price":11.0,"currency_code":"SEK","in_stock":false},{"title":"M6 \/ 30","offer_id":55300165697878,"sku":"104075","price":15.0,"currency_code":"SEK","in_stock":false},{"title":"M8 \/ 20","offer_id":55300165927254,"sku":"104076","price":19.0,"currency_code":"SEK","in_stock":false},{"title":"M8 \/ 30","offer_id":55300165992790,"sku":"104077","price":37.0,"currency_code":"SEK","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0776\/7864\/1494\/files\/rostfri-nu-din-921-slotted-screw.jpg?v=1789067451","url":"https:\/\/rostfri.nu\/en\/products\/sparskruv-med-stort-huvud-a1-din-921","provider":"Rostfri.nu","version":"1.0","type":"link"}