S-92451A540 1/4"-20 x 3/4" ASME B18.6.3 Brass Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from premium brass construction, ensuring long-term reliability in harsh environments
• Excellent tensile strength of 50,000 psi provides secure fastening for demanding industrial applications
• Precise Class 2A thread fit guarantees smooth installation and consistent performance in UNC coarse threading
• 82° countersink angle enables flush mounting for clean, professional finishes in various materials
• Full threading along the 3/4" length offers maximum grip and holding power throughout the fastener
• Rockwell B50 hardness maintains structural integrity under repeated stress and vibration
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory adherence for global industrial projects

Professional Applications & Engineering Value

This 1/4"-20 UNC brass flat head slotted screw delivers exceptional engineering value in applications requiring corrosion resistance and reliable fastening. The premium brass material naturally resists rust and galvanic corrosion, making it ideal for marine, electrical, and plumbing systems where moisture exposure is common. The standard 82° countersink angle and flat head design allow for seamless flush installation in metal, wood, and composite materials, eliminating protrusions that could interfere with mechanical operations. With UNC coarse threading and Class 2A fit, it provides quick assembly and vibration resistance in machinery, construction frameworks, and industrial equipment. The slotted drive offers compatibility with standard tools, while the fully threaded 3/4" length ensures maximum engagement in both thin and thick materials, solving common challenges of loosening and material fatigue in dynamic environments.

Specification Summary & Compliance

This fastener maintains precise inch system dimensions with a head diameter of 0.477", head height of 0.153", and thread diameter of 0.25". The UNC coarse thread with Class 2A fit ensures consistent dimensional accuracy per ASME standards. Manufacturing and material compliance include ASME B18.6.3 specifications for mechanical and dimensional requirements, along with full adherence to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for restricted substance-controlled projects.