S-91802A551 1/4"-20 x 2 1/4" ASME B18.6.3 Stainless Steel Phillips Oval Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and outdoor applications
• High tensile strength of 80,000 psi ensures reliable load-bearing capacity and structural integrity in demanding mechanical assemblies
• Precision UNC coarse threading with Class 2A fit provides smooth installation and secure fastening with reduced cross-threading risks
• Optimized oval head design with Phillips No. 3 drive offers a flush finish and efficient torque transfer during installation
• Enhanced durability with Rockwell B80 hardness for long-term performance under vibration and stress
• Compliance with ASME B18.6.3 standards guarantees dimensional accuracy and interchangeability in professional applications
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

This 1/4"-20 oval head screw is engineered to address critical challenges in industrial and construction settings where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel material provides exceptional protection against rust and chemical exposure, making it suitable for marine, food processing, and outdoor structural applications. The UNC coarse thread and partial threading design ensure rapid assembly and secure clamping in materials like metal, wood, and composites, reducing installation time while maintaining joint integrity. With its oval head profile and Phillips drive, it delivers a clean, low-profile finish that minimizes snagging and improves aesthetic appeal in visible assemblies. These features collectively enhance operational efficiency and reduce maintenance costs in demanding environments.

Specification Summary & Compliance

This screw adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse spacing, ensuring consistent performance and interchangeability. It meets ASME B18.6.3 specifications for flat head screws, confirming manufacturing accuracy and reliability. Environmental and safety compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) adherence, supporting use in regulated sectors without hazardous substance concerns.