{"product_id":"black-phosphate-drywall-screws-fine-thread-200","title":"Black Phosphate Drywall Screws Fine Thread Box of 200","description":"\u003cp\u003eBlack phosphate drywall screws with a fine thread profile are designed for securing plasterboard to metal stud and track framing. Supplied in a box of 200, these 3.5 mm diameter screws are available in lengths from 25 mm to 42 mm to suit varying board thicknesses.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTreatment\u003c\/td\u003e\n\u003ctd\u003eBlack phosphate coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e3.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Lengths\u003c\/td\u003e\n\u003ctd\u003e25 mm, 32 mm, 38 mm, 42 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread Profile\u003c\/td\u003e\n\u003ctd\u003eFine thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive Type\u003c\/td\u003e\n\u003ctd\u003eBugle head, compatible with standard drywall drivers and screwguns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Quantity\u003c\/td\u003e\n\u003ctd\u003e200 screws per box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat they are used for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFixing single or double layers of plasterboard to metal stud partitions and ceiling track\u003c\/li\u003e\n\u003cli\u003eAttaching plasterboard to metal angle bead framing in commercial dry-lining applications\u003c\/li\u003e\n\u003cli\u003eSecuring acoustic or fire-rated board to light-gauge steel framing systems\u003c\/li\u003e\n\u003cli\u003eGeneral drywall installation where a fine thread is required for a clean, controlled fix into metal\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFitting and handling\u003c\/h2\u003e\u003cp\u003eFine thread drywall screws are intended for use with metal stud and track only - do not use them in timber framing, where a coarse thread screw is the correct choice. Drive screws until the head sits just below the board surface without breaking the paper face, as over-driving will weaken the fixing and create blowouts that are difficult to fill cleanly. Store boxes in a dry location away from damp conditions to prevent any surface degradation of the phosphate coating before use.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between fine thread and coarse thread drywall screws?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFine thread screws have closely spaced threads designed to cut cleanly into metal stud and track without stripping. Coarse thread screws have wider thread spacing that grips timber effectively. Using the wrong type can result in a poor fix or damage to the framing material.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the black phosphate coating prevent staining through plasterboard?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBlack phosphate provides a degree of corrosion resistance and significantly reduces the risk of rust bleed-through at the screw head after plastering or painting. It is not a stainless coating, so these screws are suitable for internal dry applications only and should not be used in damp or external environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long a screw do I need for standard plasterboard?\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFor single-layer 12.5 mm plasterboard on metal stud, a 25 mm or 32 mm screw is generally sufficient. For 15 mm board, or where a second layer is being fixed, a 38 mm or 42 mm length is recommended to ensure adequate penetration into the stud.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the difference between fine thread and coarse thread drywall screws?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Fine thread screws have closely spaced threads designed to cut cleanly into metal stud and track without stripping. Coarse thread screws have wider thread spacing that grips timber effectively. Using the wrong type can result in a poor fix or damage to the framing material.\"}},{\"@type\":\"Question\",\"name\":\"Will the black phosphate coating prevent staining through plasterboard?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Black phosphate provides a degree of corrosion resistance and significantly reduces the risk of rust bleed-through at the screw head after plastering or painting. It is not a stainless coating, so these screws are suitable for internal dry applications only and should not be used in damp or external environments.\"}},{\"@type\":\"Question\",\"name\":\"How long a screw do I need for standard plasterboard?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For single-layer 12.5 mm plasterboard on metal stud, a 25 mm or 32 mm screw is generally sufficient. For 15 mm board, or where a second layer is being fixed, a 38 mm or 42 mm length is recommended to ensure adequate penetration into the stud.\"}}]}\u003c\/script\u003e\u003cp\u003eNottage Timber Merchants supplies trade and retail customers across South Wales, with next-day delivery available to the Bridgend area. If you are working on a partition or ceiling project, browse our \u003ca href=\"\/collections\/mdf-sheets\"\u003eMDF sheets\u003c\/a\u003e for complementary board materials to complete your build.\u003c\/p\u003e","brand":"Nottage Timber Merchants","offers":[{"title":"3.5 x 25 mm","offer_id":53050317111633,"sku":null,"price":1.82,"currency_code":"GBP","in_stock":true},{"title":"3.5 x 32 mm","offer_id":53050317865297,"sku":null,"price":2.05,"currency_code":"GBP","in_stock":false},{"title":"3.5 x 38 mm","offer_id":53050321568081,"sku":null,"price":2.24,"currency_code":"GBP","in_stock":true},{"title":"3.5 x 42 mm","offer_id":53050322977105,"sku":null,"price":2.38,"currency_code":"GBP","in_stock":true},{"title":"3.5 x 50 mm","offer_id":53050332348753,"sku":null,"price":2.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/1467\/1697\/files\/drywall.jpg?v=1771068836","url":"https:\/\/www.timberonline.co.uk\/products\/black-phosphate-drywall-screws-fine-thread-200","provider":"Nottage Timber Merchants","version":"1.0","type":"link"}