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Newport Fasteners 5/16-18 x 2-1/2" Trailer Deck & Floor Screws – Type F Floorboard Thread Cutting Screws, Flat Head, Star Drive T-40, Black Phosphate, Wood to Metal – 100 Pack
4.0 (59 items)
Limited Time SaleUntil the end
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$18.59 cheaper than the new price!!
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New $30.99
Product details
| Management number | 219159586 | Release Date | 2026/05/03 | List Price | $12.40 | Model Number | 219159586 | ||
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- TRAILER DECK & FLOORBOARD APPLICATIONS — Specifically engineered for fastening wood planks to metal trailer frames, flatbed trucks, utility trailers, cargo trailers, and horse/livestock trailers. The flat countersunk head sits flush with the deck surface for a smooth, snag-free load floor — critical for safe and efficient loading and unloading.
- TYPE F THREAD-CUTTING POINT — Unlike self-drilling screws, this Type F tip requires a pre-drilled pilot hole, then cuts clean, precise threads as it seats into the metal frame. This creates a tighter mechanical grip than standard screws and prevents loosening under vibration and dynamic load — exactly what trailer decking demands.
- SIX-LOBE STAR DRIVE (TORX T-40) — The T-40 Torx drive design virtually eliminates cam-out and stripped heads during installation. The 5/16-18 size uses a T-40 bit (not T-30) — confirm your driver before starting. Use with a standard drill or impact driver for fast, reliable installation across full deck replacements.
- BLACK PHOSPHATE FINISH — ALLOY STEEL CONSTRUCTION — Hardened alloy steel core delivers the shear strength and torque resistance needed for structural trailer fastening. Black phosphate finish provides corrosion resistance and acts as a lubricant during installation. Also called: Six-Lobe Screw | Torx Screw | Decking Screw | Star Drive Screw | Floorboard Screw.
- Versatile Professional Use: These screws are designed to meet the rigorous demands of contractors, automotive professionals, manufacturers, and DIY enthusiasts; From securing floorboards in trailers to assembling furniture and machinery, do it all
- PILOT HOLE GUIDE — 9/32" BIT RECOMMENDED — The 5/16-18 size requires a pre-drilled pilot hole before installation. Use a 9/32" drill bit for steel cross-members; H-bit for aluminum frames. Drill through the wood and into the metal frame, then drive the screw — the cutting edges form tight threads as it seats. Pro tip: run two drills simultaneously — one for drilling, one for driving — to move fast on a full deck.
- COMPATIBLE APPLICATIONS — Flatbed trailers, utility trailers, horse & livestock trailers, cargo trailers, drop deck trailers, curtain vans, dry vans, gooseneck trailers, and truck beds. Ideal for securing apitong hardwood decking, oak, and treated lumber to steel cross-members and C-channel frames. The 5/16-18 is the go-to upgrade size when replacing worn 1/4-20 fasteners.
- ALSO CALLED / SEARCH TERMS — Floorboard Screw | Trailer Floor Screw | Decking Screw | Six-Lobe Screw | Torx Screw | Star Drive Screw | Type F Screw | Thread Cutting Screw | Wood to Metal Screw | Countersunk Trailer Screw | 5/16 Deck Screw | T40 Trailer Screw. If you searched any of these terms, this is your screw.
- BULK QUANTITY OPTIONS AVAILABLE — This listing ships 100 pcs. Also available in larger carton quantities for contractors, trailer manufacturers, and fleet maintenance operations. Visit our Amazon storefront for additional size and quantity options.
- WHY NEWPORT FASTENERS — We're an industrial fastener supplier, not a general merchandise reseller. Every SKU we carry is sourced to specification. With 120 verified reviews and a 4.8-star rating on this product, you can order with confidence. Questions about specs, quantities, or compatibility? We answer messages fast.
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Thread Forming & Cutting Screws
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