S-90211A360 5/8"-11 x 1 1/2" SAE J429 Left-Hand Threaded High-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with Grade 8 classification and 150,000 PSI tensile strength for critical heavy-duty applications
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh industrial environments
• Precise thread engagement with Class 3A thread fit ensuring reliable fastening in high-vibration settings
• Left-hand threading design providing secure fastening in rotating equipment where standard right-hand threads might loosen
• Full threading coverage along the 1½" length for maximum grip strength and distribution of clamping force
• External hex drive compatibility with standard tools for quick installation and removal in confined spaces
• Certified performance meeting SAE J429 specifications for consistent quality and engineering reliability

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers exceptional engineering value through its left-hand UNC coarse threading and zinc yellow-chromate plating, specifically designed to address critical industrial challenges. The left-hand thread direction prevents loosening in rotating machinery and equipment where counter-rotational forces are present, while the coarse thread pitch provides faster assembly and superior performance in softer materials or applications subject to vibration. The external hex drive configuration offers high torque capability for secure fastening in heavy machinery, construction equipment, and automotive applications. With Rockwell C33 hardness and 150,000 PSI tensile strength, this fastener maintains integrity under extreme loads, making it ideal for structural connections, industrial machinery, and equipment requiring reliable left-hand threaded fasteners that won't compromise under stress.

Specification Summary & Compliance

This 5/8"-11 hex head screw features precise Class 3A thread fit tolerances with UNC coarse threading and left-hand direction. The fastener meets SAE J429 specifications for Grade 8 requirements, ensuring consistent manufacturing quality and performance standards. Manufactured from high-strength steel with zinc yellow-chromate plating for corrosion resistance, this 1½" fully threaded screw maintains dimensional accuracy throughout production. The product complies with industry standards for heavy-duty fastening applications where reliability and 150,000 PSI tensile strength are critical performance factors.