1/4"-20 x 3 T-30 Flat Head Self Tapping Trailer Deck Screws, 100 Pack

Self-tapping trailer deck screws, 1/4"-20 thread x 3" long, flat countersunk head, T-30 star drive. The Type F machine-screw point cuts its own threads into drilled steel crossmembers up to 1/4" thick - drill a 7/32" pilot in the steel (Type F chart max #1/0.228"), drive through the deck board with an impact driver, and the screw pulls the board tight to the frame with a machine-thread connection. This length suits 2" nominal decking. Unlike lag screws or drill-point screws, the tapped threads survive board replacement: remove the screw, replace the board, re-drive. The countersunk head with cutting nibs seats flush in hardwood and softwood decking. Use on utility trailers, equipment and flatbed trailers, dump beds, truck bodies and any wood-over-steel floor. Sold in contractor quantities; star drive bits fit standard T-30 bits.

• TYPE F SELF-TAPPING POINT - cuts machine threads directly into steel crossmembers up to 1/4" thick; drill a pilot hole, drive with an impact, no nut and no pre-tapping
• FLUSH COUNTERSUNK FLAT HEAD - nibs under the head cut a clean countersink in hardwood and softwood decking, so nothing catches a boot, a strap or a skid
• STAR DRIVE, NO CAM-OUT - deep six-lobe recess takes full impact-driver torque without stripping; far more re-drives than any Phillips deck screw survives
• REMOVABLE, SERVICEABLE JOINT - machine threads in the steel survive board replacement; back the screw out, drop a new board, drive the same screw home
• SPECS (1/4"-20 x 3") - T-30 star drive, 7/32" pilot in steel (Type F chart max: #1 / 0.228"); suits 2" nominal decking over steel frames; steel Type F thread cutting screws, made for trailer deck and floorboard replacement