S-92311A560 1/4"-28 x 1/2" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Exceptional holding power ensured by Class 3A thread fit, providing tighter tolerances and more secure fastening than standard classes
• High-strength performance with Rockwell B80 hardness, offering reliable resistance to deformation under load
• Secure, flush mounting due to the headless and cup point design, preventing component movement and minimizing protrusion
• Efficient installation and removal with the 1/8" hex drive, allowing for high torque application in confined spaces
• Precision fine threading (UNF 1/4"-28) delivers increased tensile strength and improved resistance to vibrational loosening
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw is engineered to address critical challenges in precision assembly and machinery. Manufactured from 18-8 stainless steel, it provides excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive environments, such as marine equipment, food processing machinery, and outdoor industrial apparatus. The fine thread and Class 3A fit ensure minimal backlash and superior clamp load retention, crucial for high-vibration settings like automotive components, rotating shafts, and precision instruments. The headless design with a cup point digs securely into the mating surface, preventing axial movement without protruding, which is vital for rotating parts and space-constrained assemblies. Combined with a hex drive for reliable torque transmission, this set screw delivers consistent performance in demanding industrial applications, reducing maintenance needs and enhancing operational reliability.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF fine thread with a Class 3A thread fit, ensuring high precision and tight tolerances for secure fastening. It complies with ASME B18.3 specifications for dimensional accuracy and mechanical properties. The product is manufactured in accordance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial and commercial uses.