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

5/8 x 4 1/2 Hex Lag Screw 18-8 SS

meets or exceeds ASTM F879

towers and other commercial structures

1 1/8 x 12 High Speed Long Boy (1/2" Shank)

9/16-12 x 2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (300) ThruLOK Screws Bolt Fastening System ThruLOK® comes in specific lengths9 16 12 x 2 L9 Hex Cap Screw Yellow Zinc Plated Domestic USA (300) . L9 High Tensile Strength Hex Cap Screws are designed for use in high stress, severe service environments. The highest mechanical strength off the shelf fastening system available, its special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods. Brighton Best manufactures L9 bolting from AISI alloy steels. L9