S-91879A031 3/8"-16 ASME B18.2.2, ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution due to the extra-wide thin profile, reducing surface pressure and preventing material damage
• Superior corrosion resistance from zinc-plated steel construction, extending service life in harsh industrial environments
• High-strength performance with ASTM Grade 2H classification, ensuring reliable clamping force under heavy loads
• Easy installation and removal with standard external hex drive and coarse UNC threads, saving assembly time
• Precise thread engagement through Class 2B fit, minimizing cross-threading risks and improving joint integrity
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
• Broad compatibility with ASME B18.2.2 and ASTM A194 specifications, ensuring interchangeability in standardized assemblies

Professional Applications & Engineering Value

This 3/8"-16 UNC extra-wide thin hex nut addresses critical engineering challenges in heavy machinery, structural frameworks, and industrial equipment where vibration resistance and uniform stress distribution are paramount. The zinc-plated steel construction provides a durable barrier against moisture and chemicals, significantly reducing maintenance frequency in corrosive environments like manufacturing plants and outdoor installations. Its coarse thread design enables rapid assembly in high-volume production lines, while the external hex drive ensures compatibility with standard wrenches for efficient field service. Engineered to ASTM Grade 2H strength and ASME B18.2.2 dimensions, this fastener delivers consistent performance in bolted joints subjected to dynamic loads, preventing loosening and maintaining structural integrity over extended operational cycles.

Specification Summary & Compliance

This hex nut features 3/8"-16 UNC coarse threads with Class 2B thread fit per ASME B18.2.2, ensuring precise dimensional accuracy and reliable mating with corresponding fasteners. Manufactured from zinc-plated steel under ASTM A194 material guidelines, it meets ASTM Grade 2H mechanical properties for high-strength applications. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms adherence to hazardous substance restrictions and environmental safety protocols for global industrial use.