S-90185A437 5/8"-11 x 1 1/2" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity – With a tensile strength of 120,000 psi, this bolt reliably handles high-stress applications without failure.
• Superior Corrosion Resistance – Zinc-plated steel construction provides lasting protection against rust and environmental wear in harsh conditions.
• Secure Anti-Rotation Design – The square neck under the rounded head locks firmly into materials, preventing spinning during installation and use.
• Precision Thread Fit – Class 3A UNC coarse threads ensure tight, reliable fastening with reduced risk of cross-threading or loosening.
• Enhanced Durability – Rockwell C25 hardness offers excellent resistance to deformation and wear over extended service life.
• Broad Industry Compliance – Meets ASME B18.5 and SAE J429 standards, guaranteeing consistent quality and performance in regulated environments.
• Environmental Safety Assurance – RoHS 3 and REACH compliance ensures safe use without hazardous substances, supporting sustainable operations.

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered for demanding industrial and construction settings where reliability is critical. The zinc-plated steel material combats corrosion in outdoor or high-moisture environments, extending service life in structural frameworks, machinery assemblies, and transportation equipment. Its fully threaded UNC coarse pattern with a Class 3A fit allows for quick, secure installation in wood, metal, and composite materials, minimizing assembly time while resisting vibration-induced loosening. The square neck design effectively counters rotation, making it ideal for applications requiring stable, permanent fastening without the need for additional locking mechanisms. By integrating high tensile strength and standardized dimensions, this bolt addresses common challenges like joint integrity and maintenance frequency, delivering consistent performance in heavy-duty fastening tasks.

Specification Summary & Compliance

This carriage bolt features a 5/8"-11 UNC coarse thread with Class 3A precision tolerances for optimal fit and strength. Manufactured to ASME B18.5 and SAE J429 specifications, it ensures dimensional accuracy and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards without restricted substances.