{"product_id":"kullrig-maskinskruv-krysspar-ph-a4-din-7985","title":"Pan head machine screw | Phillips drive PH | A4 | DIN 7985","description":"\u003cp\u003ePan head machine screw with Phillips (PH) recess in acid-proof stainless steel A4 (AISI 316), also known as an MRX screw, cross-head screw, lens head screw, or pan head cross-recess screw, is intended for use in outdoor, industrial, and marine environments. The product complies with DIN 7985 (replaced by ISO 7045) and is used where a low-profile, metric screw connection with a pan head and cross recess is required. It is suitable for professional installations where long service life and consistent performance are essential.\u003c\/p\u003e\u003ch2\u003eFIELD OF APPLICATION\u003c\/h2\u003e\u003cp\u003eThe pan head machine screw is used in electronics and appliance manufacturing, instruments, cabinets and enclosures, fittings, boat and marine installations, the food industry, and general mechanical assembly. It is intended for applications where the screw is driven into a nut or threaded hole using a standard Phillips screwdriver or bit, and where the material selection provides the necessary protection against corrosion and mechanical stress. The acid-proof machine screw is available in dimensions M1.6, M2, M2.5, M3, M4, M5, M6, and M8 in lengths from 3 to 100 mm.\u003c\/p\u003e\u003ch2\u003eTECHNICAL SPECIFICATIONS\u003c\/h2\u003e\u003cul\u003e\n\n\u003cli\u003eProduct type: Screw\u003c\/li\u003e\n\n\u003cli\u003eProduct family: Pan head machine screw (MRX, cross-head screw, lens head screw, metric pan head screw)\u003c\/li\u003e\n\n\u003cli\u003eMaterial class: A4 (AISI 316, acid-proof)\u003c\/li\u003e\n\n\u003cli\u003eStandard: DIN 7985 (substantially equivalent to ISO 7045)\u003c\/li\u003e\n\n\u003cli\u003eThread dimension: M1.6–M8, metric thread\u003c\/li\u003e\n\n\u003cli\u003eDrive type: Phillips cross recess, type H (PH)\u003c\/li\u003e\n\n\u003cli\u003eDesign: Pan head (lens head), threaded\u003c\/li\u003e\n\n\u003cli\u003eEnvironment: Marine \/ Outdoor\u003c\/li\u003e\n\n\u003cli\u003eDelivery unit: Piece\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\u003ch2\u003eFREQUENTLY ASKED QUESTIONS (FAQ)\u003c\/h2\u003e\u003ch3\u003eWhat is a pan head machine screw according to DIN 7985?\u003c\/h3\u003e\u003cp\u003eDIN 7985 describes machine screws with a metric thread, pan head (lens head), and cross recess. In Sweden, the screw is often called MRX or cross-head screw. The standard has been replaced by ISO 7045, which has essentially the same design but slightly different head dimensions in certain sizes.\u003c\/p\u003e\u003ch3\u003eWhat is the difference between Phillips (PH) and Pozidriv (PZ)?\u003c\/h3\u003e\u003cp\u003eThis screw has a Phillips cross recess, type H, and must be driven with a PH bit or PH screwdriver. Pozidriv (type Z, PZ) has additional markings between the arms of the cross and a different recess geometry. Always use bits that match the recess type, otherwise, the risk of the bit slipping out and damaging the recess increases. For stainless steel screws, \u003ca href=\"\/en\/products\/bits-ph\"\u003estainless steel Phillips bits\u003c\/a\u003e are recommended to avoid cross-contamination rust.\u003c\/p\u003e\u003ch3\u003eWhich bit size should I use?\u003c\/h3\u003e\u003cp\u003eAs a guideline, PH1 is used for M2.5–M3, PH2 for M4–M5, PH3 for M6, and PH4 for M8. For the smallest dimensions, M1.6–M2, PH0 or PH1 is used depending on the design.\u003c\/p\u003e\u003ch3\u003eHow is the length of a pan head machine screw measured?\u003c\/h3\u003e\u003cp\u003eThe length is measured from the underside of the head to the tip of the screw; the head is therefore not included. Choose the length based on the thickness of the parts to be fastened as well as the height of any washer and nut.\u003c\/p\u003e\u003ch3\u003eWhat is the difference between A2 and A4?\u003c\/h3\u003e\u003cp\u003eA4 (AISI 316) contains molybdenum and withstands chlorides better than A2 (AISI 304). Choose A4 for marine environments, coastal locations, or chemical exposure, and A2 for general indoor and outdoor use. In cases of constant seawater contact or oxygen-deprived crevices, even A4 can be susceptible to crevice corrosion.\u003c\/p\u003e\u003ch3\u003eWhat is the difference compared to a pan head hex socket screw according to DIN 7380?\u003c\/h3\u003e\u003cp\u003eDIN 7380 has a hex socket and a lower, wider head, whereas DIN 7985 has a cross recess and is driven with a standard Phillips screwdriver or bit. See also \u003ca href=\"\/en\/products\/insexskruv-bult-kullrig\"\u003ePan head hex socket screw A4 DIN 7380\u003c\/a\u003e.\u003c\/p\u003e","brand":"WASI","offers":[{"title":"M1.6 \/ 3","offer_id":55482660323670,"sku":"104850","price":0.3,"currency_code":"SEK","in_stock":true},{"title":"M1.6 \/ 4","offer_id":55482660356438,"sku":"104851","price":0.3,"currency_code":"SEK","in_stock":true},{"title":"M1.6 \/ 6","offer_id":55482660389206,"sku":"104852","price":0.3,"currency_code":"SEK","in_stock":true},{"title":"M2 \/ 6","offer_id":55482660421974,"sku":"104853","price":0.3,"currency_code":"SEK","in_stock":true},{"title":"M2 \/ 10","offer_id":55482660454742,"sku":"104854","price":0.4,"currency_code":"SEK","in_stock":true},{"title":"M2.5 \/ 4","offer_id":55482660487510,"sku":"104855","price":0.3,"currency_code":"SEK","in_stock":true},{"title":"M2.5 \/ 5","offer_id":55482660520278,"sku":"104856","price":0.3,"currency_code":"SEK","in_stock":true},{"title":"M2.5 \/ 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