S-91249A366 1/4"-20 x 1 1/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration.
• Rockwell B70 hardness provides superior durability and resistance to wear over time.
• Fully threaded UNC coarse spacing delivers faster installation and superior holding power in various materials.
• Class 2A thread fit guarantees consistent, precise engagement for reduced assembly issues.
• No. 3 Phillips drive allows for easy, secure driving with standard tools, improving efficiency.
• Rounded pan head design offers a low-profile finish that minimizes snagging and enhances safety.

Professional Applications & Engineering Value

This 1/4"-20 x 1-1/4" Rounded Head Screw is engineered to address common industrial challenges such as corrosion, high-stress fatigue, and assembly inefficiencies. The Black-Oxide 18-8 Stainless Steel construction provides excellent resistance to rust and chemicals, making it suitable for outdoor, marine, and chemical processing applications. With a fully threaded UNC coarse spacing and Class 2A thread fit, it ensures quick, reliable fastening in metals, plastics, and wood, reducing the risk of cross-threading and improving workflow in assembly lines. The combination of 70,000 psi tensile strength and Rockwell B70 hardness supports heavy-duty use in machinery, automotive, and construction, where long-term reliability is critical.

Specification Summary & Compliance

This screw features precise UNC coarse thread with Class 2A fit for consistent dimensional accuracy. It is manufactured in compliance with ASME B18.6.3 standards, ensuring uniformity and reliability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental compliance for global industrial use.