One-way, pin-hex, pin-Torx, and shear-nut drives require special tooling or cannot be removed at all — for public fixtures, transit, electronics, and asset protection.
Conforms to

Security drive heads resist unauthorized removal.
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-TMP
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.
Cylindrical hex-drive head, high-tensile precision screw.
M3–M24 · #4–1"
Uniform machine thread for tapped holes and nuts.
#2–1/2" · M2–M12
Six-sided structural workhorse for nut or tapped-hole joints.
M5–M48 · 1/4"–2"
Headless threaded screw that locates against a shaft.
M3–M16 · #4–1/2"
Grade, material, finish, and standard — matched to your joint and quoted from stock. Tell us the load case and we’ll confirm the line.