S-92949A603 5/16"-24 x 1" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• Precise, secure fastening ensured by Class 3A thread fit and UNF fine threading for vibration resistance
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for demanding loads
• Easy installation and removal with 3/16" hex drive design, reducing assembly time
• Full thread engagement along the 1" length for maximum holding power in various materials
• Compliance with industry standards including ASME B18.3, ensuring reliability and interchangeability
• Environmentally safe with RoHS 3 and REACH compliance, meeting global regulatory requirements

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress applications. The passivated finish enhances its durability in moist or chemical-exposed environments, while the UNF fine thread and Class 3A fit provide tight tolerances that resist loosening under dynamic loads. Commonly used in machinery, automotive assemblies, and electronic enclosures, its hex drive and button head style allow for flush mounting and easy access in confined spaces, reducing maintenance downtime and improving operational reliability.

Specification Summary & Compliance

This fastener features a 5/16"-24 UNF fine thread with Class 3A precision fit, ensuring dimensional accuracy per ASME B18.3 standards. It is fully threaded over a 1" length and manufactured from 18-8 stainless steel with a passivated surface treatment. Compliance includes ASME B18.3 for mechanical specifications, RoHS 3 (2015/863/EU), and REACH (EC 1907/2006), confirming adherence to environmental and safety regulations without hazardous substances.