S-98625A185 1/4"-100 x 1/2" Set Screws

Key Features & Benefits at a Glance

• Superior vibration resistance from the ultra fine 1/4"-100 thread spacing, ensuring components stay securely locked in high-stress applications.
• Excellent corrosion resistance provided by 303 Stainless Steel material, ideal for harsh industrial environments and extending service life.
• High-strength, durable tip made from alloy steel with a ball point design for increased surface contact and superior gripping power without damaging shafts.
• Precise, reliable fastening guaranteed by the Class 3A thread fit, offering tighter tolerances for critical assembly requirements.
• Easy installation in confined spaces with the headless design and 3/32" hex drive, allowing for efficient tool access and a clean finished profile.
• Broad regulatory compliance with RoHS 3 and REACH, ensuring environmental safety and suitability for regulated industries.
• Consistent performance with UNS right-hand threads and standardized dimensions for reliable interchangeability and reduced assembly time.

Professional Applications & Engineering Value

This ultra fine thread set screw is engineered to solve critical challenges in precision assemblies where vibration-induced loosening is a primary concern. The 303 Stainless Steel construction provides excellent resistance to corrosion and oxidation, making it suitable for applications in automotive, aerospace, and electronic enclosures exposed to varying environmental conditions. The ball tip, crafted from hardened alloy steel, maximizes holding force on rotating shafts and gears by concentrating pressure, minimizing fretting and surface damage. Combined with the Class 3A thread fit and hex drive design, it ensures repeatable, secure fastening in tight spaces, reducing maintenance needs and enhancing the longevity of machinery and equipment.

Specification Summary & Compliance

This set screw adheres to UNS thread standards with a Class 3A thread fit for high precision. Key dimensions include a 0.25" thread diameter, 1/2" length, and 0.156" ball tip diameter. It is manufactured to comply with RoHS 3 (2015/863/EU) with exemption 6(c) and REACH (EC 1907/2006), ensuring it meets stringent environmental and safety regulations for industrial use.