S-92451A537 1/4"-20 x 1/2" ASME B18.6.3 Brass Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance due to brass construction, ensuring long-term reliability in humid or demanding industrial environments
• Excellent electrical conductivity for applications requiring grounding or electrical connections, reducing the risk of short circuits
• High tensile strength of 50,000 psi provides secure fastening under mechanical stress, minimizing the risk of failure
• Precise Class 2A thread fit ensures smooth installation and consistent engagement, reducing assembly time and improving joint integrity
• Fully threaded design offers maximum grip length and holding power across the entire shank for versatile applications
• 82° countersink angle allows for a flush finish in countersunk holes, enhancing aesthetics and preventing snagging
• Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to strict quality and environmental standards, ensuring safe and reliable use

Professional Applications & Engineering Value

These 1/4"-20 UNC brass flat head slotted screws are engineered to address common industrial challenges such as corrosion, electrical isolation, and mechanical stability. The brass material inherently resists rust and oxidation, making these screws ideal for marine, plumbing, and electrical enclosures where moisture exposure is a concern. The slotted drive style allows for straightforward installation with standard tools, while the coarse thread spacing ensures quick assembly and strong holding power in softer materials or pre-tapped holes. With a Rockwell B50 hardness and 50,000 psi tensile strength, they provide dependable performance in applications requiring vibration resistance and durability, such as machinery assembly, automotive components, and electronic device mounting. The fully threaded design and standard flat head profile enable secure, flush fastening in countersunk holes, reducing protrusion and improving safety in high-traffic areas.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC thread with Class 2A fit for precise dimensional accuracy and smooth threading. It is manufactured in compliance with ASME B18.6.3 standards, ensuring consistent quality and interchangeability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental regulations for hazardous substance restrictions. Additional specifications include a right-hand thread direction, coarse thread spacing, and full threading along the 1/2" length, providing reliable performance in various industrial fastening scenarios.