ThruLOK® comes in specific lengths that allow contractors to replace their 1/2" carriage and through-bolts in three primary deck applications:

3/8-16 x 4 Hex Tap Bolt Silicon Bronze

1/2-13 x 9 Grade 5 Hex Cap Screw Zinc Plated

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

8 x 1 3/4 Phillips Flat Particle Board Screw w/ Nibs T17 Zinc Plated - Carton (4

7/16-14 x 2 Grade 8 Hex Cap Screw Plain Domestic USA (400) 3/8-16 Hex Tap Bolts Silicon Bronze ThruLOK® comes in specific lengths7 16 14 x 2 Grade 8 Hex Cap Screw Plain Domestic USA (400). Grade 8 Hex Cap Screws are manufactured in the USA from medium carbon alloy steel. In diameters 1 4 to 1 1 2 inches our Grade 8 material meets or exceeds SAE J429 Grade 8 specifications. Diameters over 1 1 2 inches meet or exceed ASTM A354 Grade BD. All material is manufactured with rolled threads. Yellow zinc plated bolting will meet or exceed ASTM F1941. Typical hardness on diameters 1 4 to