S-91700A258 10-32 x 5/8" ASME B18.6.3 Brass Slotted Oval Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with brass construction, ideal for harsh environments and electrical applications where rust prevention is critical.
• Exceptional mechanical strength with a tensile strength of 50,000 psi and Rockwell B50 hardness, ensuring reliable performance under high-stress conditions.
• Precise, secure fastening thanks to the Class 2A thread fit and UNF fine thread profile, which provides excellent vibration resistance and reduces the risk of loosening.
• Flush, professional finish with an 82° countersink angle and standard oval head profile, allowing for seamless installation and a clean aesthetic.
• Full-thread engagement along the entire 5/8" length, maximizing grip strength and load distribution in assembled components.
• Broad industry compliance meeting ASME B18.6.3 specifications and environmental standards like RoHS 3 and REACH, ensuring safety and regulatory acceptance.
• Easy manual installation with a slotted drive design, compatible with standard screwdrivers for straightforward assembly and maintenance.

Professional Applications & Engineering Value

This 10-32 UNF brass screw is engineered to address common industrial challenges such as corrosion, vibration-induced failure, and the need for reliable, long-lasting fasteners in precision assemblies. The brass material offers inherent anti-galling and non-magnetic properties, making it ideal for electrical enclosures, marine hardware, and instrumentation. The oval head with slotted drive and 82° countersink ensures a flush mount, preventing snagging and providing a smooth surface—critical in applications where aerodynamics or safety are priorities. Combined with fine threading and full-length threads, it delivers superior holding power in softer materials or thin sheets, reducing the risk of strip-out and maintaining joint integrity under dynamic loads.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit tolerances and the UNF (Unified National Fine) thread standard for precise, consistent engagement. Manufacturing and dimensional criteria strictly follow ASME B18.6.3. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I for lead in brass alloys and meets REACH (EC 1907/2006) requirements, ensuring environmental and safety standards are upheld for industrial and international use.