S-94355A713 1/4"-28 x 3/4" 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 thread fit, ensuring a secure, reliable fastening in critical assemblies.
• Optimized for high-torque applications featuring a 1/8" hex drive in a headless design, allowing for flush mounting and easy installation in confined spaces.
• Precise, non-marring clamping with a flat tip design that distributes pressure evenly, protecting sensitive shaft surfaces.
• Enhanced durability and wear resistance from a Rockwell B80 hardness, maintaining thread integrity and performance under repeated use.
• Reliable fine thread engagement with 1/4"-28 UNF threads, providing a greater number of threads per inch for a stronger, more secure connection.
• Guaranteed material safety and environmental compliance, meeting RoHS 3 and REACH regulations for use in regulated industries.

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw is engineered to solve critical challenges in precision assembly and motion control systems. The combination of 18-8 stainless steel and a fine thread spacing provides excellent resistance to loosening under vibration, a common failure point in machinery and automotive components. The headless, hex drive design allows for a completely flush finish, making it ideal for securing collars, gears, and pulleys on shafts without protruding hardware. The flat tip offers a positive grip without digging into the shaft, preventing damage and ensuring consistent alignment. This makes it a vital component for engineers requiring a high-strength, corrosion-resistant fastener that adheres to strict dimensional and material standards for reliable, long-term performance in demanding industrial environments.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF thread with a precision Class 3A thread fit for tight tolerances and superior engagement. It is manufactured in accordance with the ASME B18.3 specification, ensuring dimensional consistency and interchangeability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it is free from hazardous substances and suitable for use in environmentally conscious and regulated applications.