{"product_id":"5-16-18-x-3-1-2-in-self-tapping-trailer-deck-screws-durable-fit","title":"5\/16-18 x 3 1\/2 in Self-Tapping Trailer Deck Screws - Durable Fit","description":"\u003cp\u003eIn this review of the 5\/16-18 x 3 1\/2 in self-tapping trailer deck screws the bottom line is straightforward: these fasteners are built for installers who need reliable thread-cutting performance and a flush finish when securing trailer floorboards or similar heavy-duty panels. The reviewer found the Type F point cut into wood and thin plate steel reliably, while the hardened steel with black phosphate and oil coating held up well against handling and outdoor use. If you need a screw that balances cutting ability, torque acceptance and a countersunk look, this is worth considering.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType F point:\u003c\/strong\u003e cuts threads into wood and thin metal plate so installers can save time by avoiding pre-tapping in many applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened steel construction:\u003c\/strong\u003e provides strength for repeated use and reduces breakage risk when driving into tough decking or trailer framing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack phosphate and oil coating:\u003c\/strong\u003e adds corrosion resistance and helps the screws slide into material more smoothly during installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStar drive T-40:\u003c\/strong\u003e reduces slippage and cam-out so more torque can be applied safely without stripping the head.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat countersunk head:\u003c\/strong\u003e creates a flush finish for a cleaner deck surface and better board-to-board seating when driven correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eContractors, trailer builders, automotive technicians and experienced DIYers who routinely secure floorboards, trailer decks, or equipment beds will appreciate the thread-cutting capability and hardened construction. The screws are geared toward projects where a flush, durable fastening is required and where installers can use a T-40 star bit to maximize torque.\u003c\/p\u003e\n\u003cp\u003eThose who need stainless corrosion resistance for constant saltwater exposure or a decorative exposed-fastener finish should look elsewhere; this product prioritizes strength and thread-forming ability over bright finish or marine-grade metallurgy.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType F thread-forming point reliably cuts threads into wood and thin plate steel for fast installs.\u003c\/li\u003e\n\u003cli\u003eStar drive T-40 head greatly reduces stripping and allows higher torque transfer.\u003c\/li\u003e\n\u003cli\u003eHardened steel with black phosphate and oil finish improves durability and corrosion resistance for outdoor use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot stainless steel, so it is not ideal for continuous saltwater exposure or highly corrosive environments.\u003c\/li\u003e\n\u003cli\u003eRequires the correct T-40 driver and attention to recommended hole or plate thickness for best fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e5\/16-18 x 3 1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoint type\u003c\/td\u003e\n\u003ctd\u003eType F self-tapping (thread cutting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive\u003c\/td\u003e\n\u003ctd\u003eStar drive (Torx) T-40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead style\u003c\/td\u003e\n\u003ctd\u003eFlat countersunk head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial \u0026amp; finish\u003c\/td\u003e\n\u003ctd\u003eHardened steel, black phosphate with oil coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThese screws are a practical choice for anyone fitting trailer decks or securing wood to thin metal where thread-forming ability and a flush finish matter. Their combination of hardened steel, T-40 drive and Type F point deliver dependable performance and good value for installers who can accommodate the non-stainless finish.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan these screws cut threads in thin steel plate?\u003c\/strong\u003e\u003cbr\u003eYes, the Type F point is designed to form threads in wood and thin plate steel; customers reported successful use with 1\/4 in plate in typical trailer applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the heads strip easily?\u003c\/strong\u003e\u003cbr\u003eThe star drive T-40 significantly reduces slippage and stripping when used with the correct bit and proper driver technique.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these screws suitable for marine use?\u003c\/strong\u003e\u003cbr\u003eThey have a black phosphate and oil coating for corrosion resistance but are not stainless; for constant saltwater exposure a stainless fastener is recommended.\u003c\/p\u003e","brand":"Newport Fasteners","offers":[{"title":"Default Title","offer_id":48195339223259,"sku":"B084ZGBPJP","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/4148-yPUhhL._SL1000.jpg?v=1770290524","url":"https:\/\/gearmusthave.com\/products\/5-16-18-x-3-1-2-in-self-tapping-trailer-deck-screws-durable-fit","provider":"GearMustHave","version":"1.0","type":"link"}