S-92785A529 1/4"-20 x 1 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Exceptional holding power provided by the 90° cone point design, which bites securely into materials to prevent component slippage
• High-strength performance with a Rockwell B80 hardness rating, offering excellent durability and resistance to deformation under load
• Precise, reliable fit guaranteed by UNC Class 3A thread tolerances, ensuring consistent engagement and reduced risk of cross-threading
• Easy installation and removal with the 1/8" hex drive, allowing for high torque application in confined spaces without head protrusion
• Optimized for industrial applications featuring coarse (UNC) right-hand threads for rapid assembly and robust performance in high-vibration settings
• Compliance with major industry standards including ASME B18.3, ensuring interchangeability and meeting rigorous engineering specifications

Professional Applications & Engineering Value

This 1/4-20 UNC Class 3A set screw is engineered to address critical challenges in industrial assembly and precision machinery. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it ideal for applications in moist or chemically aggressive environments. The headless design with a hex drive allows for flush mounting, eliminating obstructions in compact assemblies while enabling high torque application. The 90° cone point creates a firm, permanent grip on shafts, collars, and gears, preventing rotational or axial movement in high-vibration systems. Its coarse thread configuration ensures quick installation and reliable performance in dynamic load conditions, reducing maintenance needs and enhancing operational safety in heavy-duty applications.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision and strength. It measures 1 1/4" in length with a cone point angle of 90° and is manufactured from 18-8 stainless steel hardened to Rockwell B80. The product conforms to ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it meets stringent industry and safety standards for global use.