S-98625A169 1/4"-80 x 4" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 303 Stainless Steel construction, ideal for harsh environments and extended service life
• Exceptional holding power and minimal backlash ensured by the ultra-fine 1/4"-80 thread and precise Class 3A thread fit
• High torque application capability with the hex drive design, allowing for secure installation in confined, headless applications
• Reduced component damage and increased grip from the durable alloy steel ball tip, which provides concentrated contact pressure
• Reliable, right-hand thread engagement following UNS standards for consistent performance in automated or manual assembly
• Extended 4" length for deep penetration and secure fastening in thick materials or complex assemblies
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring suitability for global markets and sensitive applications

Professional Applications & Engineering Value

This 1/4"-80 ultra fine thread set screw is engineered to address critical challenges in precision machinery and industrial equipment. The 303 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for use in demanding environments such as aerospace, automotive, and medical device manufacturing. The ultra-fine thread and Class 3A thread fit deliver superior vibration resistance and minimal loosening under dynamic loads, while the headless hex drive design allows for flush mounting in space-constrained applications. The inclusion of a hardened alloy steel ball tip ensures maximum grip and reduces damage to shaft surfaces, offering reliable performance in collars, gears, and pulleys where precise axial positioning is crucial.

Specification Summary & Compliance

This set screw features a 1/4"-80 UNS ultra fine thread with a Class 3A thread fit for high precision and tight tolerances. The drive style is a 3/32" hex, and the screw has a total length of 4" with a right-hand thread direction. It is manufactured from 303 Stainless Steel and includes an alloy steel ball tip with a diameter of 0.156". The product is compliant with RoHS 3 (2015/863/EU) under exemption 6(c) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards.