S-97763A359 5/16"-18 x 3/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments.
• Superior tensile strength of 70,000 psi ensures reliable performance under high-stress applications.
• Precise Class 3A thread fit provides secure, vibration-resistant fastening with minimal risk of loosening.
• Hex drive design allows for easy installation and high torque application without slippage.
• Fully threaded shank offers consistent holding power along the entire 3/4" length for versatile use.
• Rounded button head profile delivers a low-profile, finished appearance while reducing snagging risks.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to strict quality and environmental standards.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these Black-Oxide 18-8 Stainless Steel rounded head screws combine durability with precision. The coarse UNC thread and Class 3A fit ensure quick assembly and robust connections in machinery, automotive, and structural applications, resisting vibration and fatigue. The hex drive facilitates efficient installation in confined spaces, while the corrosion-resistant finish extends service life in humid or chemically aggressive environments. Ideal for OEM and MRO use, these screws provide reliable fastening solutions that minimize maintenance and downtime.

Specification Summary & Compliance

This screw meets ASME B18.3 specifications, with a 5/16"-18 UNC coarse thread and Class 3A thread fit for high precision. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Manufactured from 18-8 Stainless Steel with a Rockwell B55 hardness, it maintains dimensional accuracy and performance in industrial fastening applications.