Replace lag screws with the Grip Rite PrimeGuard Plus Hex Washer Head Structural Screw. The 3/8" x 12" screw drives with a 3/8" hex driver or a T-25 star bit (dual-drive head), and the Type 17 self-drilling point cuts into framing lumber without pre-drilling. PrimeGuard Plus exterior coating is approved for use in ACQ pressure-treated lumber, and the screws are ICC-ES evaluated under ESR-3933 for code-compliant structural connections.

• Size: 3/8" x 12"
• Dual-drive head: 3/8" hex washer with T-25 star recess
• Type 17 self-drilling point - no pre-drilling required in softwood framing
• PrimeGuard Plus corrosion-resistant coating (approved for ACQ-treated lumber)
• ICC-ES evaluation report ESR-3933 for code-compliant load-bearing connections
• Designed to replace lag screws in wood-to-wood structural attachment
• Free driver bit included with every box
• Pack: 50 screws per box

Applications: Deck framing and ledger attachment, pergola and gazebo construction, multi-ply beam lamination, stair stringer attachment, playground structures, and general exterior wood-to-wood structural connections.

Tip: 3/8" x 12" handles 6x6 or 8x6 post-to-beam laminations with full thru-pass, locks triple 2x beam stacks across the full beam depth, and ties hammer-driven 4x4 post-to-triple-2x rim connections on heavy deck framing. This is the longest size in the line; verify the assembly thickness before ordering to avoid over-protrusion.