Its square drive and flat head with nibs ensure secure installation and good holding power

3/8-16 x 6 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated Domestic USA (175)

strip-resistant engagement

1/4-20 x 1 3/4 Grade 5 Hex Cap Screw Plain Domestic USA (1400)

5/8-18 x 1 1/4 Grade 8 Hex Cap Screw Plain Domestic USA (225)

1/2-13 x 6 A325 Type 1 Heavy Hex Bolt Plain - Bulk Keg (150) 1/2-13 Grade 5 Hex Cap Screws Plain - Domestic USA Its square drive and flatThis 1 2 13 x 6 A325 Type 1 Heavy Hex Bolt Plain comes in a bulk keg containing 150 heavy hex bolts. It meets ASTM A325 specifications for structural bolts, making it perfect for a range of construction projects.