S-92451A542 1/4"-20 x 1" ASME B18.6.3 Brass Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with brass construction, ideal for harsh environments and electrical applications
• High tensile strength of 50,000 psi ensures reliable, long-lasting fastening under significant load
• Precise Class 2A thread fit provides smooth installation and reduces the risk of cross-threading
• 82° countersink angle and flat head design allows for a flush, secure fit in tapered seats
• Full threading along the 1" length maximizes grip and holding power in various material thicknesses
• Rockwell B50 hardness offers excellent durability and resistance to wear and deformation
• Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards

Professional Applications & Engineering Value

This 1/4-20 UNC brass flat head slotted screw is engineered to address common industrial challenges, such as corrosion in marine, plumbing, and electrical systems. The brass material provides inherent resistance to rust and galvanic corrosion, making it a reliable choice for applications where moisture or chemicals are present. The slotted drive style offers simplicity and compatibility with standard tools, while the coarse thread spacing ensures quick installation and strong holding power in soft materials like wood and plastic. With its fully threaded design and 82° countersink angle, it delivers a secure, flush finish that minimizes protrusion and enhances safety in assemblies. Ideal for use in machinery, consumer electronics, and construction, this screw combines durability with regulatory compliance to meet rigorous industrial demands.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent performance and UNC coarse threads per ASME specifications. It meets ASME B18.6.3 for mechanical and dimensional requirements, ensuring reliability in flat head screw applications. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industries without hazardous substances.