{"product_id":"pinnskruv-a4-din-939","title":"Pinnskruv | A4 | DIN 939","description":"\u003cp\u003ePinnskruv A4 DIN 939, även kallad stiftskruv, pinnbult eller gängbult, i syrafast rostfritt stål A4-70 (AISI 316) är avsedd för användning i utomhus-, industri- och marina miljöer där en lösbar gängförbindelse med fast förankring i ett gängat hål krävs. Produkten uppfyller DIN 939 med inskruvningsände på 1,25 x d och används där en demonterbar förbindelse mot hus, flänsar och maskindelar behövs. Den är lämpad för professionella installationer där lång livslängd och konsekvent prestanda är avgörande.\u003c\/p\u003e\u003ch2\u003eANVÄNDNINGSOMRÅDE\u003c\/h2\u003e\u003cp\u003ePinnskruven används inom maskinbyggnad, flänsförband, pumpar, ventilhus, kemisk industri och marina installationer. Den är avsedd för applikationer där en gängad pinnbult skruvas fast i ett gängat hål, till exempel i gjutjärn eller stål, och där materialvalet ger nödvändigt skydd mot korrosion och mekanisk belastning. Den syrafasta pinnskruven finns i dimensionerna M6, M8, M10, M12, M16, M20, M24 och M30.\u003c\/p\u003e\u003ch2\u003eTEKNISKA SPECIFIKATIONER\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eProdukttyp: Skruv\u003c\/li\u003e\n\u003cli\u003eProduktfamilj: Pinnskruv (stiftskruv, pinnbult, gängbult)\u003c\/li\u003e\n\u003cli\u003eMaterialklass: A4 (AISI 316, syrafast)\u003c\/li\u003e\n\u003cli\u003eHållfasthetsklass: A4-70\u003c\/li\u003e\n\u003cli\u003eStandard: DIN 939\u003c\/li\u003e\n\u003cli\u003eGängdimension: M6–M30, metrisk gänga\u003c\/li\u003e\n\u003cli\u003eUtförande: Inskruvningsände 1,25 x d, gängad i båda ändar\u003c\/li\u003e\n\u003cli\u003eMiljö: Marine \/ Outdoor\u003c\/li\u003e\n\u003cli\u003eLeveransenhet: Styck\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eVANLIGA FRÅGOR (FAQ)\u003c\/h2\u003e\u003ch3\u003eVad är en pinnskruv och vad betyder DIN 939?\u003c\/h3\u003e\u003cp\u003eEn pinnskruv, också kallad stiftskruv eller pinnbult, är en skruv utan huvud som är gängad i båda ändar. Den ena änden skruvas fast i ett gängat hål och den andra änden får en mutter. DIN 939 anger pinnskruvar med en inskruvningsände på cirka 1,25 gånger gängdiametern (1,25 x d), avsedda för bland annat gjutjärn.\u003c\/p\u003e\u003ch3\u003eVad är skillnaden mellan DIN 938, DIN 939 och DIN 835?\u003c\/h3\u003e\u003cp\u003eSkillnaden ligger i längden på inskruvningsänden. DIN 938 har 1,0 x d och används främst i stål, DIN 939 har 1,25 x d och används bland annat i gjutjärn, och DIN 835 har 2,0 x d och används i mjukare material som aluminium. Välj standard efter materialet i det gängade hålet.\u003c\/p\u003e\u003ch3\u003eHur väljer jag rätt längd på pinnskruven?\u003c\/h3\u003e\u003cp\u003eLängden avser hela pinnskruvens längd exklusive inskruvningsänden. Välj längd utifrån godstjockleken på de delar som ska klämmas ihop samt brickans och mutterns höjd, så att minst ett par gängvarv sticker ut ovanför muttern.\u003c\/p\u003e\u003ch3\u003ePassar A4 för marin miljö?\u003c\/h3\u003e\u003cp\u003eA4 (AISI 316) innehåller molybden och har bättre motståndskraft mot klorider än A2, vilket gör materialet lämpligt för kust- och marina miljöer. Vid ständig sjövattenkontakt eller stillastående, syrefattiga förhållanden kan även A4 drabbas av spaltkorrosion och bör då kontrolleras mot den aktuella applikationen.\u003c\/p\u003e\u003ch3\u003eVad är skillnaden mellan A2 och A4?\u003c\/h3\u003e\u003cp\u003eA4 (AISI 316) innehåller molybden och tål klorider bättre än A2 (AISI 304). Välj A4 för marin miljö eller kemisk påverkan och A2 för allmän inom- och utomhusanvändning. 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