S-91249A553 1/4"-20 x 2" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black-oxide coating, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Optimized drive engagement through No. 3 Phillips drive design, reducing cam-out and improving installation efficiency
• Precise thread compatibility with UNC coarse spacing and Class 2A thread fit, ensuring secure fastening in various materials
• Enhanced durability with fully threaded 2" length, providing maximum grip and vibration resistance in demanding applications
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
• Versatile pan head design with standard rounded profile offering improved clamping force distribution and aesthetic appeal

Professional Applications & Engineering Value

These black-oxide 18-8 stainless steel screws deliver critical performance advantages in industrial settings where corrosion resistance and structural integrity are paramount. The combination of 70,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in high-stress applications, from machinery assembly to structural frameworks. The UNC coarse threading with Class 2A fit provides excellent engagement in both metals and plastics, while the Phillips drive system enables efficient installation without specialized tools. The black-oxide surface treatment not only enhances corrosion protection but also reduces light reflection in sensitive equipment environments. These fully threaded pan head screws are engineered to maintain clamping force under vibration and thermal cycling, making them ideal for manufacturing equipment, automotive components, and outdoor infrastructure projects.

Specification Summary & Compliance

This 1/4"-20 x 2" pan head screw features precise UNC coarse thread spacing with Class 2A thread fit tolerance for consistent fastening performance. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety. The right-hand thread direction and fully threaded design ensure maximum engagement length across the entire 2" shank for superior holding power in industrial applications.