S-91512A130 6-32 x 1/4" Left-Hand-Thread Stainless Steel Hex-Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh industrial environments.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under high-stress conditions.
• Precise left-hand thread engagement with Class 3A fit and UNC coarse threading, providing secure fastening in reverse-thread applications.
• Flush mounting capability due to the standard flat head and 82° countersink angle, ideal for sleek, unobtrusive installations.
• Efficient installation and removal using the 5/64" hex drive, enabling quick assembly with standard tools while minimizing slippage.
• Full threading along the 1/4" length ensures maximum grip and uniform load distribution across the fastened materials.
• Compliance with environmental regulations including RoHS 3 and REACH, making them safe for use in regulated industries.

Professional Applications & Engineering Value

These 6-32 UNC left hand thread flat head screws are engineered to address critical challenges in industrial and mechanical assemblies where reverse threading is essential to prevent loosening from rotational forces. Crafted from 18-8 stainless steel with a passivated finish, they resist corrosion and oxidation, extending service life in demanding settings like machinery, automotive, and electronics. The Class 3A thread fit and coarse UNC threading ensure tight tolerances and easy alignment, reducing the risk of cross-threading. With a flat head design and 82° countersink angle, they sit flush on surfaces, minimizing protrusions in compact spaces. Ideal for left-hand applications in conveyors, pumps, and fixtures, these screws provide reliable, high-strength fastening that withstands vibration and heavy loads, enhancing overall assembly integrity.

Specification Summary & Compliance

This screw features a 6-32 UNC left hand thread with Class 3A fit for precise dimensional accuracy, ensuring consistent performance in coarse-thread applications. Key specifications include a length of 1/4", full threading, and a standard flat head profile with an 82° countersink angle. Manufactured from 18-8 stainless steel with a passivated finish, it meets industry standards for durability. Compliance is verified with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming adherence to environmental and safety regulations for industrial use.