The flathead also uses a Torx drive system that accepts a wider range of bit sizes

Heavy hex bolts offer the accessibility of normal hex units while offering a larger head

19/32 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank)

including fastening multi-ply LVL beams and girder trusses

1 1/8-7 x 4 1/4 A325 Type 1 Heavy Hex Bolt Plain Domestic (USA) - Bulk Keg (125) 9/16-18 Grade 8 Hex Cap Screws Yellow Zinc Plated The flathead also uses aThis 1 1 8 7 x 4 1 4 A325 Type 1 Heavy Hex Bolt is domestically manufactured in the USA. This pack contains 125 high strength bolts, providing you with reliable and secure fastening solutions.