S-92190A179 3/4"-10 x 1 1/2" ASME B18.2.1, SAE J429 Left-Hand Threaded Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 110,000 psi tensile strength, ideal for high-stress industrial assemblies
• Superior corrosion resistance and durability from Grade 5 steel construction and Rockwell C21 hardness
• Secure, vibration-resistant fastening through left-hand UNC coarse threading, preventing unintended loosening in rotating machinery
• Easy installation and removal with external hex drive and 1 1/8" head width, compatible with standard tools
• Precise thread engagement with Class 2A thread fit, ensuring reliable connections in demanding applications
• Full-length threading for maximum grip and uniform stress distribution along the entire 1 1/2" length
• Compliance with global safety standards, including RoHS 3 and REACH, for environmentally responsible sourcing

Professional Applications & Engineering Value

This Grade 5 steel hex head screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors. Its left-hand thread design is specifically advantageous for applications where counter-clockwise rotation could loosen standard fasteners, such as on rotating shafts or equipment with reverse-torque conditions. The coarse UNC threading and fully threaded 1 1/2" length provide superior holding power in soft materials or when frequent disassembly is required. Manufactured from high-strength steel with Rockwell C21 hardness, it resists wear and deformation under dynamic loads, while the external hex drive allows for high-torque installation without stripping. Ideal for securing conveyor systems, motor mounts, and structural frames, this fastener ensures long-term reliability in industrial environments where vibration and stress are prevalent.

Specification Summary & Compliance

This fastener adheres to ASME B18.2.1 and SAE J429 Grade 5 specifications, with precise Class 2A thread fit for consistent engagement. The 3/4"-10 UNC coarse thread maintains dimensional accuracy across the 1 1/2" fully threaded length. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no restricted substances are used in its manufacture for global industrial applications.