{"product_id":"1-4-20-x-4in-self-tapping-trailer-deck-screws-flat-head-star-drive","title":"1\/4-20 x 4in Self-Tapping Trailer Deck Screws, Flat Head, Star Drive","description":"\u003cp\u003eOur review of these 1\/4-20 x 4in self-tapping trailer deck screws finds them most useful for contractors, trailer builders, and serious DIYers who need reliable, rust-resistant fasteners for wood and thin metal. The single biggest reason to buy is simple: the Type F point reliably cuts threads into decking and plate steel while the Torx T-30 drive reduces cam-out, so installations go faster and with fewer broken or stripped heads.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-tapping Type F point:\u003c\/strong\u003e Cuts threads into wood and thin metal so you can install floorboards and deck plates without pre-tapping or tapping inserts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened steel construction:\u003c\/strong\u003e Provides strength for heavy-duty applications and resists deformation under high torque.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlack phosphate and oil coating:\u003c\/strong\u003e Adds corrosion resistance and reduces galling during installation for longer service life in outdoor or trailer use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStar drive T-30:\u003c\/strong\u003e Delivers higher torque transfer with less slippage, reducing stripped heads and speeding up repetitive installs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat countersunk head:\u003c\/strong\u003e Sits flush when driven correctly, giving a neat finish and preventing snagging on floor surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThese screws are aimed at professionals and experienced DIYers who work on trailer decks, flooring projects, light fabrication, or machinery assembly where a strong, flush fastener is required. The combination of thread-forming point and hardened steel makes them suitable for securing wooden floorboards to trailer frames and for fastening through 1\/4in plate steel into wood backing.\u003c\/p\u003e\u003cp\u003eUsers who need stainless corrosion resistance for marine or continuously wet environments should consider a stainless fastener instead, since these are black phosphate coated steel designed for general corrosion resistance rather than full marine duty.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eType F thread-forming point simplifies installations by cutting threads into wood and thin metal without separate tapping.\u003c\/li\u003e\n\u003cli\u003eStar drive T-30 reduces cam-out and allows higher torque for secure, reliable fastening.\u003c\/li\u003e\n\u003cli\u003eDurable hardened steel with black phosphate and oil coating improves longevity and resists corrosion in typical trailer use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eBlack phosphate coated steel is not as corrosion resistant as stainless for continuous saltwater exposure.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e1\/4-20 x 4in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoint Type\u003c\/td\u003e\n\u003ctd\u003eType F self-tapping\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Style\u003c\/td\u003e\n\u003ctd\u003eFlat countersunk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrive\u003c\/td\u003e\n\u003ctd\u003eStar drive (Torx) T-30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHardened steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eBlack phosphate with oil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Quantity\u003c\/td\u003e\n\u003ctd\u003e500 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThese 1\/4-20 x 4in self-tapping screws are a practical choice for trailer decks, flooring, and light fabrication where strong, flush fasteners are needed. The thread-forming Type F point and Torx drive reduce installation time and failures, and the hardened steel with black phosphate coating offers solid durability and value for most non-marine applications.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan these screws cut threads into plate steel?\u003c\/strong\u003e\u003cbr\u003eYes, the Type F point is designed to cut threads into wood and thinner plate steel when driven into appropriate backing material.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the head sit flush with decking?\u003c\/strong\u003e\u003cbr\u003eYes, the flat countersunk head is intended to sit flush when driven to the recommended depth.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre these suitable for marine use?\u003c\/strong\u003e\u003cbr\u003eThey have black phosphate and oil coating for corrosion resistance, but stainless fasteners are preferable for continuous saltwater exposure.\u003c\/p\u003e","brand":"Newport Fasteners","offers":[{"title":"Default Title","offer_id":48751145877723,"sku":"B07D3MVFD3","price":374.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/512ba3zVwYL._SL1000_bfcdf40a-86ab-4bed-bfb7-51befdb40e56.jpg?v=1778830838","url":"https:\/\/gearmusthave.com\/products\/1-4-20-x-4in-self-tapping-trailer-deck-screws-flat-head-star-drive","provider":"GearMustHave","version":"1.0","type":"link"}