Also called lag screws, these coarse-pitch, gimlet-point fasteners drive into timber with a hex head and wrench, delivering high withdrawal and shear capacity without a pilot nut.
Conforms to

Heavy hex-head wood screw for high-withdrawal timber fixing.
A cross-section of stocked configurations. Not exhaustive — diameters, lengths, grades, and finishes extend across the full range on request.
Representative specifications — not exhaustive · NXB-LAG
Match the line to the load, the environment, and the standard it answers to.
Materials
Finishes
Standards
Typical applications
Served industries
Mating parts and adjacent lines engineers reach for alongside this one.
Coarse, deep thread with a tapered point for timber.
#4–#16 · Ø3–Ø8 mm
Six-sided structural workhorse for nut or tapped-hole joints.
M5–M48 · 1/4"–2"
Corrosion-resistant exterior screw with a reinforced thread.
#8–#10 · Ø4.0–Ø4.8 mm
Spreads clamp load and protects the bearing surface.
M3–M36 · #6–1-1/2"
Grade, material, finish, and standard — matched to your joint and quoted from stock. Tell us the load case and we’ll confirm the line.