S-91783A559 1/4"-28 x 3/4" ASME B18.6.3 Stainless Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel and passivated finish, ideal for harsh or humid environments.
• High tensile strength of 100,000 psi ensures reliable load-bearing capacity and resistance to mechanical stress.
• Precise Class 2A thread fit guarantees smooth assembly and secure fastening with minimal risk of cross-threading.
• Fully threaded UNF fine thread design provides maximum grip and vibration resistance in critical applications.
• Slotted drive and rounded head allow for easy installation and a clean, low-profile appearance.
• Compliance with ASME B18.6.3 ensures consistent quality and interchangeability in industrial assemblies.
• RoHS 3 and REACH compliance supports environmental regulations and safe use in various sectors.

Professional Applications & Engineering Value

This 1/4"-28 UNF rounded head slotted screw in 18-8 stainless steel with a passivated finish is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly precision. The fully threaded fine thread and Class 2A fit enhance holding power in machinery, electronics, and automotive components, reducing maintenance needs. Its high tensile strength and Rockwell B100 hardness make it suitable for demanding environments where durability and reliability are critical. Ideal for OEMs and MRO applications, this screw ensures long-term performance without compromising on regulatory standards.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF fine thread with Class 2A dimensional accuracy and is fully threaded for consistent engagement. It meets ASME B18.6.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and suitable for global industrial use.