3/4"-10 A563 DH Large Nuts

Produced in accordance with ASTM A563 Grade DH standard, the 3/4"-10 Large nut undergoes quenching and tempering heat treatment to obtain consistent mechanical performance and controlled hardness. It is purpose‑engineered to mate with high‑strength structural bolts including A325 and A490, offering dependable proof‑load capacity for heavy‑duty bolted joints.

Compared with standard hex nuts, this large‑style nut features a bigger bearing area, which spreads clamping force more evenly. It effectively lowers the possibility of base material crushing under high preload, improves anti‑vibration and anti‑fatigue performance, and resists unintended loosening under cyclic and dynamic working loads, securing long‑term connection stability.

Its 3/4‑10 UNC coarse thread offers robust thread engagement and balanced stress transfer. Hot‑dip galvanizing treatment is applicable for outdoor and corrosive‑environment applications, and over‑tapped threads allow smooth installation after galvanizing.

With strictly regulated material and mechanical indexes following North‑American fastener specifications, this nut is well‑suited for steel structures, bridges and heavy‑equipment assemblies. It satisfies engineering acceptance criteria and seamlessly adapts to North‑American standard‑based procurement and project requirements.

We are certified by ISO9001:2015, IATF16949:2016, and other international quality standard certifications.

Long-term quality warranty and comprehensive after-sales service are provided.