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A307 Grade B Heavy Hex Cap Screws, Zinc CR+3 (Inch)
Our USA‑manufactured A307 Grade B Heavy Hex Cap Screws with Zinc CR+3 plating offer dependable fastening performance for structural, industrial, and general‑purpose applications. Made from high‑quality carbon steel and produced to ASTM A307 Grade B specifications, these heavy hex screws feature a larger, thicker hex head for increased wrenching strength, a broader bearing surface, and improved clamping capability under load.
The Zinc CR+3 finish provides enhanced corrosion resistance compared to standard zinc coatings, delivering a cleaner appearance, improved durability, and extended protection in indoor and light‑to‑moderate outdoor environments. Ideal for steel fabrication, equipment assembly, construction, and maintenance operations, these American‑made fasteners deliver consistent mechanical performance, clean threading, and reliable tensile strength across a wide range of applications.
Proudly Made in the USA, our Zinc CR+3 A307 Grade B Heavy Hex Cap Screws combine durable carbon‑steel construction with a bright, corrosion‑resistant trivalent zinc coating for long‑lasting performance. Their heavy hex head design allows for superior torque application and secure, stable fastening in structural frames, machinery setups, and industrial assemblies. Available in multiple coarse‑thread sizes and lengths, these American‑made screws provide dependable quality and strength for everyday and heavy‑duty bolting needs.
