S-92311A078 2-56 x 5/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh or humid industrial environments
• Precise, secure fastening ensured by Class 3A thread fit, minimizing the risk of loosening under vibration
• High-strength, durable performance from Rockwell B80 hardness, providing excellent resistance to wear and deformation
• Easy and efficient installation with a hex drive (0.035") and headless design, allowing for flush mounting in tight spaces
• Enhanced grip and holding power from the cup tip design, which bites into the contact surface for a more secure lock
• Reliable coarse (UNC) threading for quick assembly and reduced cross-threading risk in various applications
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met

Professional Applications & Engineering Value

This 2-56 UNC set screw is engineered to address critical challenges in precision assembly and machinery. The 18-8 Stainless Steel material offers excellent resistance to oxidation and chemical exposure, making it suitable for applications in electronics, automotive components, and medical devices where durability is paramount. The headless design and hex drive allow for a flush finish, preventing interference in compact mechanisms. With a Class 3A thread fit and coarse thread spacing, it ensures rapid, reliable installation while maintaining high clamping force, reducing downtime in production lines. The cup tip provides superior biting action on shafts or collars, preventing slippage in high-torque environments. Ideal for securing gears, pulleys, and knobs, this screw delivers consistent performance in demanding industrial set screw applications.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. The UNC thread with Class 3A fit provides tight tolerances for reliable engagement. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances. Manufactured from 18-8 Stainless Steel with a hardness of Rockwell B80, it meets industry standards for strength and durability in precision fastening applications.