S-92311A343 3/8"-24 x 7/8" 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 and vibration resistance due to the Class 3A fine thread fit, ensuring secure and precise fastening
• High-strength performance with a Rockwell B80 hardness rating, providing reliable durability under heavy loads
• Secure, flush-mount installation with a headless design and hex drive, allowing for tight spaces and a clean finish
• Enhanced grip and anti-loosening from the cup tip design, which bites into the mating surface for a firm hold
• Broad industrial compliance meeting ASME B18.3 standards, ensuring consistent quality and interchangeability
• Environmentally safe for global use with RoHS 3 and REACH compliance, supporting responsible manufacturing and supply chain requirements

Professional Applications & Engineering Value

This 3/8"-24 UNF Class 3A fine thread set screw is engineered to address critical challenges in precision assembly and machinery. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive settings, such as marine equipment, food processing machinery, and outdoor industrial devices. The headless hex drive and cup tip design ensure a secure, flush fit that minimizes protrusion and maximizes grip on shafts, gears, and pulleys, effectively preventing slippage and maintaining alignment under vibration. By utilizing a fine thread and Class 3A fit, this screw delivers tighter tolerances and superior clamping force compared to coarse threads, reducing the risk of loosening in high-stress environments. Ideal for industrial set screws applications requiring reliability and precision, it supports OEMs and maintenance teams in achieving long-term operational stability and reduced downtime.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and a UNF fine thread with 3/8"-24 size. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent performance and interchangeability. Additionally, the product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming its safety for use in various industrial and international markets.