S-90306A228 1/4"-20 x 1 1/2" Left-Hand Threaded 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional tensile strength of 70,000 psi ensures reliable performance under high-stress conditions
• Left-hand threading provides secure fastening in applications requiring reverse rotation resistance
• Precision Class 2A thread fit guarantees consistent engagement and reduced assembly issues
• Full threading along the 1-1/2" length offers maximum grip and load distribution
• External hex drive design allows for easy installation with standard tools and high torque application
• Rockwell B70 hardness maintains thread integrity and durability through repeated use

Professional Applications & Engineering Value

These left-hand UNC hex head screws are engineered to address critical challenges in machinery and equipment where standard right-hand threads may loosen under counter-clockwise motion. Made from 18-8 stainless steel, they resist rust and corrosion in demanding settings like marine, chemical processing, and outdoor installations. The coarse UNC threading and Class 2A fit ensure quick assembly and reduced cross-threading risks, while the external hex drive supports high-torque applications without slippage. Ideal for securing components on rotating shafts, mixers, or safety-critical assemblies, these screws provide reliable, long-term fastening solutions that minimize maintenance and downtime.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A fit for precise dimensional accuracy, a length of 1-1/2", and full threading. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.