S-90124A622 3/8"-16 x 3/4" ASME B18.2.1, SAE J429 Steel Wire-Lockable Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure
• Zinc-plated steel construction provides superior corrosion resistance, extending service life in harsh industrial environments
• Grade 5 classification guarantees consistent mechanical properties and durability for demanding assembly requirements
• Coarse UNC threading with Class 2A fit enables quick installation and secure fastening in various materials
• External hex drive design offers excellent torque transmission and tool accessibility for efficient assembly operations
• Full threading along the 3/4" length provides maximum grip and load distribution across the entire fastener
• Compliance with multiple industry standards ensures quality consistency and regulatory acceptance across global markets

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The zinc-plated steel construction combats corrosion in manufacturing facilities, outdoor equipment, and automotive assemblies, while the coarse UNC thread profile maintains secure fastening in materials prone to vibration loosening. With 120,000 psi tensile strength and Rockwell C25 hardness, this fully threaded fastener withstands extreme mechanical stresses in heavy machinery, construction frameworks, and transportation equipment. The external hex drive configuration ensures reliable torque application during high-volume assembly operations, making it ideal for production lines requiring consistent clamping force and rapid installation cycles.

Specification Summary & Compliance

This 3/8"-16 UNC hex head screw features Class 2A thread fit tolerances for precise engagement and meets ASME B18.2.1 and SAE J429 Grade 5 specifications for dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across international markets. Manufacturing follows standardized protocols for zinc-plated steel coatings, maintaining consistent 0.375" thread diameter and 3/4" length dimensions across production batches.