S-91249A644 1/4"-20 x 7/8" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior 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 in demanding mechanical applications
• Coarse UNC threading with Class 2A fit provides quick assembly and secure fastening in various materials
• Fully threaded design offers maximum grip and uniform load distribution along the entire length
• Phillips pan head drive allows for efficient installation with standard tools and a low-profile rounded head
• Compliance with ASME B18.6.3 guarantees consistent quality and dimensional accuracy for industrial use
• RoHS and REACH compliance ensures environmental safety and regulatory adherence in global markets

Professional Applications & Engineering Value

These 1/4"-20 x 7/8" Black-Oxide 18-8 stainless steel screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress conditions. The Black-Oxide coating on 18-8 stainless steel enhances durability in moist or chemically aggressive settings, reducing maintenance costs. With coarse UNC threads and Class 2A fit, they ensure rapid installation and reliable hold in metal, plastic, or wood assemblies. The Phillips pan head design facilitates easy driving while maintaining a low profile, making them ideal for machinery, automotive, and electrical enclosures where strength and corrosion resistance are critical.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with Class 2A tolerance for precise fit, fully threaded along a 7/8" length. It meets ASME B18.6.3 specifications for dimensional standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring no hazardous substances and adherence to environmental and safety requirements in industrial applications.