Quenched-and-tempered alloy steel fasteners at the top of the strength range — SAE Grade 8, class 10.9 and 12.9 — for high-preload, high-fatigue, and safety-critical joints.
Conforms to

Grade 8 / 10.9 / 12.9 for maximum 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-HTF
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"
A325/A490 heavy-hex assemblies for steel connections.
1/2"–1-1/2" · M16–M36
NAS/MS-pedigree fasteners in titanium and superalloy.
#10–1/2" · M5–M12
Six-sided structural workhorse for nut or tapped-hole joints.
M5–M48 · 1/4"–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.