S-95955A307 1/4"-20 x 3/4" Left-Hand-Thread Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable performance under high stress
• Secure and efficient installation via the 5/32" hex drive, preventing cam-out and ensuring precise torque application
• Reliable reverse-threading operation with left-hand UNC coarse threads, designed for specific applications where standard rotation would loosen the fastener
• Consistent and precise fit guaranteed by Class 2A thread fit, reducing the risk of cross-threading and assembly issues
• Full-length threading for maximum grip and engagement along the entire 3/4" length, enhancing joint integrity
• Compliance with stringent environmental regulations, including RoHS 3 and REACH, ensuring safe and sustainable use in industrial settings

Professional Applications & Engineering Value

This 1/4"-20 left-hand UNC rounded head screw is engineered to address critical challenges in industrial and mechanical assemblies. Its 18-8 stainless steel composition provides excellent resistance to corrosion and oxidation, making it suitable for applications exposed to moisture, chemicals, or outdoor elements. The left-hand coarse threading is specifically designed for use in rotating machinery or equipment where standard right-hand threads might loosen due to operational forces, thereby preventing unintended disassembly and enhancing safety. The fully threaded design and Class 2A thread fit ensure a secure, vibration-resistant connection, reducing maintenance needs and downtime. Coupled with a rounded button head and hex drive, it offers a low-profile, aesthetically pleasing finish while allowing for easy installation in confined spaces, making it a versatile choice for automotive, manufacturing, and heavy equipment sectors.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a precise Class 2A thread fit, ensuring dimensional accuracy and compatibility with standard mating components. It is manufactured in accordance with industry-accepted specifications for inch-system fasteners, featuring a 1/4"-20 thread size, 3/4" length, and fully threaded design. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its adherence to environmental and safety regulations for hazardous substances, making it a responsible choice for global industrial supply chains.