S-98625A650 1/4"-80 x 1/2" Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 303 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional thread engagement and vibration resistance due to the ultra-fine 1/4"-80 thread and Class 3A fit, ensuring a precise, secure, and reliable hold.
• Easy installation in confined spaces with a headless design and 3/32" hex drive, allowing for a low-profile and tool-accessible fastening solution.
• Enhanced grip and reduced component damage from the ball tip made of durable alloy steel, which provides positive seating on shafts and axles.
• Guaranteed right-hand thread direction for standard assembly procedures, promoting ease of use and reducing installation errors.
• Compliance with major environmental regulations, including RoHS 3 and REACH, ensuring your assemblies meet global safety and sustainability standards.
• Precision manufacturing for critical applications, delivering consistent 0.25" thread diameter and 1/2" length for repeatable performance in demanding setups.

Professional Applications & Engineering Value

This 1/4-80 ultra fine thread set screw is engineered to solve critical fastening challenges in precision assemblies where space is limited and vibration is a concern. The 303 Stainless Steel material offers excellent machinability and resistance to corrosion, making it suitable for automotive, aerospace, and electronics applications. The headless hex design with a 3/32" drive allows for installation in tight spaces without protruding parts, while the Class 3A thread fit ensures minimal backlash and superior holding power. The ball tip, crafted from alloy steel, digs securely into components, preventing slippage and damage to shafts or gears. This combination of ultra fine threading and robust materials provides a reliable solution for permanent or semi-permanent fastening in high-stress environments, enhancing overall assembly integrity and longevity.

Specification Summary & Compliance

This set screw features a 1/4"-80 UNS ultra fine thread with a Class 3A fit for high precision and tight tolerances. Key dimensions include a thread diameter of 0.25", length of 1/2", and a drive size of 3/32" hex. The tip is a ball type with a diameter of 0.156" made from alloy steel. It complies with RoHS 3 (2015/863/EU) with exemption 6(c) and is REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety standards for industrial use.