S-90738A220 1"-8 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 5 strength classification for reliable performance in demanding applications
• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh industrial environments
• Secure left-hand thread engagement prevents unintentional loosening in counter-rotating machinery and specialized equipment
• Precision UNC coarse threading with Class 2B fit ensures smooth installation and consistent clamping force
• Standard hex profile design provides universal compatibility with common wrenches and sockets for easy maintenance
• Comprehensive regulatory compliance with RoHS 3 and REACH standards for safe use across global markets
• Optimized dimensional stability with 1-1/2" width and 55/64" height for consistent performance in assembly operations

Professional Applications & Engineering Value

This Grade 5 hex nut delivers critical engineering solutions where reverse-thread applications demand exceptional reliability. The zinc-plated steel construction provides essential corrosion protection for industrial equipment exposed to moisture, chemicals, or outdoor elements. The 1"-8 UNC left-hand coarse thread configuration is specifically engineered for machinery with counter-clockwise rotational forces, preventing accidental disassembly in conveyor systems, mixing equipment, and rotating assemblies. The Class 2B thread fit ensures precise engagement with mating components while accommodating minor misalignments, reducing installation time and improving assembly efficiency. These industrial fasteners maintain structural integrity under vibration and heavy loads, making them ideal for construction machinery, automotive systems, and heavy equipment manufacturing where left-hand thread nuts provide critical safety functions.

Specification Summary & Compliance

This inch system hex nut features precise 1"-8 UNC coarse threads with Class 2B thread fit tolerance for consistent mating performance. Manufacturing adheres to standardized dimensional requirements with 1-1/2" width and 55/64" height specifications. The product fully complies with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations concerning chemical safety, meeting the latest compliance standards as of June 2022 for 224 SVHC substances. The Grade 5 strength classification ensures mechanical properties suitable for high-stress applications requiring reliable fastener performance.