The hex bolt is the catalog's structural backbone — a hex-head, externally threaded fastener for through-bolted and tapped connections, available fully or partially threaded across the full grade range.
Conforms to

Six-sided structural workhorse for nut or tapped-hole joints.
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-HEX
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.
Hex head with an integral flange that spreads clamp load.
M6–M20 · 1/4"–3/4"
A325/A490 heavy-hex assemblies for steel connections.
1/2"–1-1/2" · M16–M36
The standard six-sided nut for threaded assemblies.
M3–M48 · #4–2"
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.