S-98625A249 1/4"-100 x 1 1/2" Set Screws

Key Features & Benefits at a Glance

• Superior holding power with ultra-fine 1/4"-100 thread spacing for maximum resistance to vibration and loosening in precision assemblies.
• Exceptional corrosion resistance provided by 303 Stainless Steel material, ensuring long-term reliability in harsh industrial environments.
• Precise installation and removal enabled by the 3/32" hex drive, allowing secure tool engagement in confined spaces without head protrusion.
• Enhanced grip and minimal surface damage from the alloy steel ball tip, which concentrates force for secure positioning of components on shafts and axles.
• Reliable thread engagement guaranteed by Class 3A thread fit, offering tighter tolerances for high-strength, precision applications.
• Right-hand thread design ensures compatibility with standard assembly practices and common industrial equipment.
• Compliance with global environmental standards including RoHS 3 and REACH, making it suitable for regulated industries and export markets.

Professional Applications & Engineering Value

This headless set screw is engineered to address critical challenges in precision machinery and industrial equipment where space is limited and vibration resistance is paramount. The ultra-fine thread (1/4"-100) provides a higher number of threads per inch, significantly enhancing grip and load distribution on shafts, collars, and gears—effectively preventing slippage under dynamic loads. Manufactured from 303 Stainless Steel, it offers excellent machinability and corrosion resistance, reducing maintenance needs in demanding environments like automotive, aerospace, and manufacturing assemblies. The ball tip, made from durable alloy steel, minimizes damage to contact surfaces while ensuring firm seating. Combined with the Class 3A thread fit and 3/32" hex drive, this set screw delivers reliable performance in applications requiring exact alignment and repeated adjustments, making it an ideal choice for engineers seeking durability and precision in industrial fasteners.

Specification Summary & Compliance

This set screw adheres to UNS thread standards with a Class 3A thread fit for superior dimensional accuracy and tight tolerances. Key specifications include a 1/4"-100 ultra-fine thread, right-hand direction, and a length of 1 1/2". The product is fully RoHS 3 (2015/863/EU) compliant with exemption 6(c) and REACH (EC 1907/2006) compliant, ensuring it meets stringent environmental and safety regulations for industrial use.