The oversize head eliminates the need for a washer

7 x 2 1/4 Simpson Trim-Head Self-Drilling Siding Screw - Square Drive 410 SS - Box (100)

The Climaseal® 12-14 x 1 1/2 Hex Washer Head TEKS® Self Drilling Screw (T2) is ideal for use in a wide range of applications where primary fastening is needed

Each bolt is 1-8 x 3 3/4 in size

00 x 180 Socket Cap Screw 12

1-8 x 3 A325 Type 1 Heavy Hex Bolt Plain - Bulk Keg (220) 1-14 Grade 5 Hex Cap Screws Plain - Domestic USA The oversize head eliminates theThis 1 8 x 3 A325 Type 1 Heavy Hex Bolt is a great choice for your project. Made from high grade steel, it is zinc plated for maximum rust protection and comes with a 220 count per keg for a large amount of bolts. Its heavy duty construction ensures strength and durability.