Coarse threads approximately 2/3 up the shank draw the decking tightly to the substrate

No water gets into your house

14-14 x 2-1/2 Hex Washer Head Self Drilling Screw Zinc Plated Tek #3 (1000)

50 x 80 Socket Set Screw Cup Point DIN 916 Black Oxide Alloy

22 x 10 Simpson Strong-Drive® SDWS Structural Wood to Wood Timber Screw - Pack (12)

1/2-13 x 4 1/2 A325 Type 1 Heavy Hex Bolt Plain (150) 1/2-13 Grade 5 Hex Cap Screws Plain - Domestic USA Coarse threads approximately 2/3 up1 2 13 x 4 1 2 A325 Type 1 Heavy Hex Bolt Plain (150) . Heavy Hex A325 structural bolts are designed for steel to steel structural connections. For this reason, they are typically very short. The A325 and A490 specifications are not intended for general applications, including anchor bolts. Free certs available on request.