S-90185A238 3/8"-16 x 7 1/2" 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 under vibration.
• Enhanced corrosion resistance provided by the zinc-plated steel finish, extending service life in demanding industrial environments.
• High tensile strength of 120,000 psi and Grade 5 classification ensure reliable performance in heavy-duty structural and machinery applications.
• Precise Class 3A thread fit with UNC coarse threading allows for faster assembly and secure fastening in a wide range of materials.
• Excellent durability supported by Rockwell C25 hardness, maintaining structural integrity under high stress and load conditions.
• Full threading along the 7 1/2" length provides maximum grip and adjustability for various material thicknesses.
• Compliance with major industry standards including ASME B18.5 and SAE J429, guaranteeing consistent quality and interchangeability.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel carriage bolt is engineered to address critical challenges in industrial fastening, such as vibration-induced loosening and material fatigue. The square neck integrates seamlessly into pre-drilled holes, creating a firm anti-rotation lock that is essential for structural frameworks, heavy machinery, and transportation equipment. The UNC coarse thread and Class 3A fit ensure rapid, reliable installation in wood, metal, and composite assemblies, reducing labor time while enhancing joint security. With a 120,000 psi tensile strength and robust Rockwell C25 hardness, it withstands dynamic loads and harsh environmental conditions, making it ideal for construction, agricultural machinery, and material handling systems where durability and safety are paramount.

Specification Summary & Compliance

This carriage bolt features a 3/8"-16 UNC coarse thread with a precise Class 3A thread fit, ensuring dimensional accuracy per ASME B18.5 and SAE J429 standards. Manufactured from zinc-plated steel, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible procurement. The bolt's Grade 5 strength classification and full threading provide consistent performance for industrial applications requiring high reliability and standard conformity.