Hales Yeah Trailer Deck Screws 5/16-18 x 2-1/2 in, 100-Pack — Flathead T40 Torx, Self-Tapping Wood to Metal Floorboard Screw, Type F Thread Cutting, Carbon Steel, Enclosed Trailer, Utility Trailer

Type F thread-cutting tip cuts threads into steel cross-members through a 9/32 in. pilot hole — no separate tapping step; oil phosphate coating lubricates on contact to reduce drive effort and extend bit life during high-volume floorboard screw installation

Compatible with flatbed, drop-deck, curtain-side, dry van, enclosed, utility, gooseneck, and horse/livestock trailers; suitable for apitong, hardwood, and softwood deck boards fastened to steel cross-member and C-channel frames

Flathead profile sits flush with the deck surface — no raised head to snag straps, tarps, or pallet runners during cargo loading and unloading; critical for flatbed and enclosed trailer floor installations

Case-hardened carbon steel per SAE J933 — HRC 45 minimum surface hardness, 306 lb-in minimum torsional strength; black phosphate and oil finish for corrosion resistance; fully threaded UNC 5/16-18 right-hand shank for maximum holding strength in wood-to-metal trailer frame connections

100-piece pack of trailer decking screws; T40 six-lobe Torx drive (T-40 bit required — not T-30) delivers higher torque transfer and lower cam-out rate than hex or Phillips — reduces bit wear and strip-out risk during production trailer floor screw installation

Hales Yeah trailer deck screws are purpose-built for fastening wood deck boards to steel trailer frames — the standard fastener for professional trailer builders, fleet maintenance operators, and commercial contractors working with flatbed, drop-deck, curtain-side, dry van, enclosed, utility, and gooseneck trailers, including horse and livestock trailer applications. The 5/16-18 x 2-1/2 in. size and fully threaded UNC carbon steel shank deliver consistent clamping force across apitong, hardwood, and standard softwood deck boards fastened to steel cross-member and C-channel frames. The Type F thread-cutting tip eliminates the separate metal tapping step. Drill a 9/32 in. pilot hole through the deck board and steel cross-member, drive the screw, and the tip cuts its own threads on the way in — the two-step process that makes Type F the correct choice for wood-to-metal trailer decking. Standard wood screws will not reliably engage steel; standard bolts require a pre-tapped hole. Type F requires neither. The integrated oil phosphate finish lubricates on entry, reducing drive effort and extending bit life during high-volume trailer decking work. The flathead (countersunk) profile sits flush with the deck surface — no raised head to snag straps, tarps, or pallet runners during cargo loading and unloading. A critical requirement for flatbed and enclosed trailer floor installations. Drive style is T40 six-lobe Torx (T-40 bit required — not T-30), which provides higher torque transfer and lower cam-out rate than Phillips or hex-drive fasteners — less bit wear, less strip-out risk across a full deck installation. Carbon steel per SAE J933 with 80,000 PSI shear strength; black phosphate and oil finish for corrosion resistance in outdoor trailer service. Thread specification: UNC 5/16-18 (18 threads per inch), right-hand, fully threaded. The 5/16-18 is the standard upgrade when 1/4-20 fasteners have stripped their original holes — larger thread diameter, same general spacing, significantly better holding power. Each pack contains 100 screws. Pack weight 4.5 lb.