S-95289A166 1/2"-13 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and reducing maintenance costs.
• Exceptional holding power provided by the Class 3A thread fit, ensuring a tight, secure, and vibration-resistant connection.
• Enhanced grip and anti-loosening from the extended tip design, which bites deeper into the mating material for reliable performance.
• High-strength durability with a Rockwell B80 hardness, offering excellent resistance to wear and deformation under load.
• Efficient installation and removal using a standard 1/4" hex key, allowing for quick assembly and disassembly in confined spaces.
• Reliable coarse (UNC) threading for faster installation and reduced cross-threading risk compared to fine threads.
• Broad industry compliance meeting ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.

Professional Applications & Engineering Value

This 1/2"-13 UNC hex headless set screw is engineered to solve critical fastening challenges in demanding industrial applications. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for machinery, automotive components, and outdoor equipment exposed to moisture or chemicals. The extended tip and coarse thread design work together to create a powerful biting action, preventing slippage and maintaining position under high vibration or rotational forces. This is vital for securing gears, pulleys, and collars on shafts where reliability is non-negotiable. Its headless and right-hand thread configuration allows for flush mounting in tight spaces, offering a clean and unobtrusive fastening solution that upholds the integrity of the assembly.

Specification Summary & Compliance

This set screw features a 1/2"-13 UNC thread with a Class 3A fit for high precision and strength. The tip has a diameter of 0.343" and a length of 0.26" with tight tolerances for consistent performance. It is manufactured in compliance with the ASME B18.3 standard and is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for global industrial use.