S-93548A654 3/8"-16 x 9" ASTM A307, SAE J429, ASME B18.5 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance with a square neck design that prevents spinning during installation, ensuring secure and permanent fastening in wood and metal assemblies.
• Enhanced corrosion resistance provided by zinc-plated steel coating, extending service life in demanding outdoor and industrial environments.
• High tensile strength of 60,000 psi and Grade 2 classification for reliable load-bearing capacity in structural and heavy-duty applications.
• Coarse UNC threading with Class 2A fit allows for faster installation and better debris resistance, ideal for construction and agricultural equipment.
• Partially threaded shank design combines gripping power in the unthreaded section with adjustable clamping force in the threaded portion.
• Wide rounded head profile distributes pressure evenly and provides a finished appearance while preventing pull-through in softer materials.
• Rockwell B70 hardness ensures excellent durability and resistance to deformation under stress and vibration.

Professional Applications & Engineering Value

This 3/8"-16 UNC carriage bolt delivers exceptional engineering value through its specialized zinc-plated steel construction and square neck design, directly addressing common industrial fastening challenges. The partially threaded configuration provides optimal stress distribution, preventing joint loosening in high-vibration environments like construction equipment, trailer assemblies, and agricultural machinery. The coarse thread pattern ensures rapid installation while maintaining superior holding power in wood-to-metal and structural steel connections. With its Grade 2 strength rating and 60,000 psi tensile strength, this carriage bolt provides reliable performance in demanding applications where anti-rotation security and long-term durability are critical. The combination of material properties and mechanical design makes it an ideal solution for professionals seeking ASTM A307 compliant fasteners that withstand harsh operating conditions.

Specification Summary & Compliance

This carriage bolt maintains precise Class 2A thread fit tolerances with 3/8"-16 UNC coarse threading and minimum 6" thread length. Manufacturing and quality control adhere to ASTM A307, SAE J429, and ASME B18.5 specifications, ensuring dimensional accuracy and performance reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial components.