S-90185A632 3/8"-16 x 2" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that securely locks into materials, preventing the bolt from turning during installation and use.
• Exceptional tensile strength of 120,000 PSI (Grade 5) ensures reliable performance under high-stress conditions in demanding industrial applications.
• Enhanced corrosion resistance from the zinc-plated steel construction, providing durable protection against rust and extending service life in various environments.
• Wide-rounded head profile offers a larger bearing surface for improved load distribution and reduced risk of surface damage to connected materials.
• Precise coarse threading (3/8"-16 UNC) with Class 2A fit allows for faster installation and easier alignment, ideal for assembly line efficiency.
• Full threading along the 2" length provides versatile fastening options, accommodating a range of material thicknesses without compromising grip.
• High hardness rating (Rockwell C25) ensures the bolt maintains its structural integrity and resists wear, even under repetitive loading.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address common challenges in heavy-duty fastening, such as vibration-induced loosening and corrosion in harsh environments. The square neck design is critical for applications where rotation prevention is essential, such as in wood-to-metal connections, structural frameworks, and machinery assembly. Its coarse UNC threading and Class 2A thread fit enable quick, secure installations, reducing labor time while maintaining alignment accuracy. The zinc-plated finish offers reliable protection against moisture and chemicals, making it suitable for outdoor equipment, agricultural machinery, and industrial construction. With a tensile strength of 120,000 PSI, it provides a dependable solution for high-load scenarios, ensuring long-term reliability and minimizing maintenance needs in professional settings.

Specification Summary & Compliance

This carriage bolt features precise dimensions, including a 2" length, 3/8"-16 UNC coarse thread with Class 2A tolerance for consistent fit. It complies with ASME B18.5 and SAE J429 standards, ensuring manufacturing consistency and performance reliability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally responsible and safe usage in global markets.