IMSCREWS 5/16 x 4 Hex Head Lag Screws, 304 Stainless Steel, Partially Threaded Extra-Long Wood Bolts for Structural Framing, 2 pcs
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"IMSCREWS 5/16 x 4 Heavy-Duty Lag Screws - 304 Stainless Steel (2 pcs)
Extreme Penetration for Structural Timber Our 4-inch lag bolts are engineered for maximum reach in heavy-duty framing. The robust 5/16 diameter provides superior shear resistance, making these the professional choice for securing thick timber beams, landscape timbers, or structural components to 6x6 posts.
Vise-Like Clamping Power Our partially threaded shank features a smooth upper section that allows the bolt to pull the outer timber tightly against the support post. This creates a gap-free, rock-solid joint, eliminating the bridging effect common in extra-long full-thread screws for a professional-grade finish.
304 Stainless Protection Forged from premium 18-8 (304) stainless steel for elite rust protection in outdoor and humid environments. compatible with ACQ pressure-treated lumber. Prevents unsightly rust streaks on high-value cedar, redwood, or premium deck framing.
FAQ ¡ñ Tools: Fits a standard 1/2 hex socket or wrench. ¡ñ Pre-drilling: Mandatory for this length. Use a 3/16 bit for softwoods or 7/32 for hardwoods to prevent timber splitting. ¡ñ Why 4 length? Perfect for passing through 2 or 2.5 thick timber with a deep 1.5 + thread anchor in the base beam.
DEEP-ANCHOR PRECISION The 4-inch reach is engineered for thick timber assemblies, penetrating multi-layer beams to provide industrial-grade holding power.
VISE-LIKE CLAMPING Featuring a partial thread design, the smooth shank bypasses outer lumber to pull pieces together for a professional, gap-free joint.
304 WEATHER SHIELD Forged from 304 (18-8) stainless steel to endure extreme humidity and prevent rust streaks on redwood, cedar, or ACQ lumber.
HIGH-TORQUE DRIVE Robust hex head fits 1/2 socket drives perfectly, ensuring controlled, high-torque installation in dense hardwoods without head-snapping.
PRECISION 2-PACKPerfect for specialized repairs or single-point heavy mounting, providing exactly what you need for critical structural tasks.
