An integral washer-style flange under the hex head distributes bearing load and resists loosening, eliminating a separate washer in high-vibration assemblies.
Conforms to

Hex head with an integral flange that spreads clamp load.
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-FLG
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.
Six-sided structural workhorse for nut or tapped-hole joints.
M5–M48 · 1/4"–2"
Integral serrated flange spreads load and locks against backout.
M5–M20 · 1/4"–3/4"
A325/A490 heavy-hex assemblies for steel connections.
1/2"–1-1/2" · M16–M36
Sprung helical ring digs in to resist vibration loosening.
M3–M30 · #6–1-1/4"
Grade, material, finish, and standard — matched to your joint and quoted from stock. Tell us the load case and we’ll confirm the line.