#15 Construction Lag Screw Exterior Coated Torx/Star Drive Heavy Duty Structural Lag Screw – Modified Truss Washer Head

Only the #15 x 6″ is available in 50 Count Packages

#15 Screw Dimensions – ~.202 Shank Diameter – ~.275 Thread Diameter – ~5/8 Head Diameter – Use T-30 Torx Bit
Manufactured from High Quality Heat Treated Steel, Triple Coated, ACQ Treated Lumber Compatible
Type 17 Notched Extra Sharp Point for Quick Starts without “Walking”, Reduces Need for Pre-Drilling
Corrosion Resistant Lag Screws Passed the 1500 Hour Salt Spray Test Without Coating Failures
Great Screw for Decking, Fencing, Roofing, Framing, Timber Frame or Post, and Beam
Construction Lag Screws Far Exceed Standard Lag Bolts in Shear Compression Forces
Deep, Wide, Sharp Screw Threads for Maximum Holding Power, Excellent for Hard and Soft Wood
Deep Torx/Star Drive Head Reduce “Cam-out” While Driving Screw
Knurled Screw Shoulder Lowers Drill Torque Requirements, High Quality Threads Cut Clean and Easy

#15 x 3-1/2″ Construction Lag Screws with a 5/16″ thread diameter and 5/8″ modified truss head for enhanced compression. Designed for T30 Torx/Star drive bits, these exterior-coated screws are suitable for hard and soft woods, chipboard, and tough materials. Ideal for construction, they offer strong, reusable fastening with high torque transfer. Includes 100 screws.

The #15 x 2″ Structural Lag Screw Does not Have a Knurled Shoulder

Screw Engineering Specs:
Average Shear Strength of #15 Shank —920 lbf
Average Pull-Out Strength: 1.5″ (Thread Length) – 375 lbf / 2″ (Thread Length) – 500 lbf / 3″ (Thread Length) – 750 lbf / 3.5″ (Thread Length) – 875 lbf
(Screw Pull-Out is Calculated by Screws installed in the Side Grain of a Main Member – Southern Pine)

Installation Instructions Available Here