A flat countersunk head sits flush with the surface while a square or ribbed neck resists rotation — built for cutting edges, plow blades, and ground-engaging wear parts.
Conforms to

Flush countersunk head with square neck for wear edges.
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-PLW
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.
Domed head over a square neck that locks into timber and channel.
M6–M20 · 1/4"–3/4"
Six-sided structural workhorse for nut or tapped-hole joints.
M5–M48 · 1/4"–2"
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.