S-91790A542 1/4"-20 x 1" ASME B18.6.3 Stainless Steel Slotted Oval Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• High tensile strength of 80,000 psi and Rockwell B80 hardness for reliable load-bearing performance
• Precise Class 2A thread fit ensures smooth installation and secure fastening in UNC coarse threaded applications
• Standard 82° countersink angle provides a flush, professional finish when seated in matching countersunk holes
• Fully threaded design offers maximum grip and holding power along the entire 1" length
• Slotted oval head combines aesthetic appeal with practical tool engagement for straightforward installation
• Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees quality and environmental responsibility

Professional Applications & Engineering Value

This 1/4"-20 slotted oval head screw delivers exceptional engineering value in demanding industrial settings. The 18-8 stainless steel material, enhanced by passivated finish, effectively resists corrosion, oxidation, and chemical exposure—making it perfect for machinery, marine equipment, and food processing applications where moisture is a concern. Its UNC coarse threading with Class 2A fit allows for quick assembly and reduced cross-threading risks, while the oval head design sits flush to prevent snagging and improve safety. With a robust 80,000 psi tensile strength, it ensures long-term reliability in structural and mechanical assemblies, reducing maintenance needs and downtime.

Specification Summary & Compliance

This screw adheres to ASME B18.6.3 specifications, with UNC coarse threads and Class 2A fit for dimensional accuracy. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The product features a standard 82° countersink angle, right-hand thread direction, and is fully threaded for consistent performance.