Bulk 5/16″-18 6-Lobe (Torx) Flat Head Floor-Board Screws — Type F Thread-Cutting, Black-Phosphate Length:300 Qty - 5/16-18 x 3-1/2" These washers are designed to

These washers are designed to prevent fasteners like screws and bolts from loosening due to vibrations

every screw is passivated to ASTM A967 and factory wax-coated for ultra-low seating torque

Metal Framing & General Construction

79 mm pitch and 30° flank for low-stress

Bulk 5/16″-18 6-Lobe (Torx) Flat Head Floor-Board Screws — Type F Thread-Cutting, Black-Phosphate Length:300 Qty - 5/16-18 x 3-1/2" These washers are designed toMonster Overview: Ideal for steel decking, trailer flooring, truck beds, and thick plywood sub floors, these 5 16 18 6 Lobe (Torx) Flat Head Floor Board Screws feature a Type F fluted point taps mating threads in a pre drilled or punched holeno nut required; chips clear through the flute. A low glare, RoHS compliant black phosphate conversion coat partners with a factory wax oil film to deliver consistently low drive torque and added corrosion