S-91772A706 1/4"-20 x 5" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments
• Exceptional tensile strength rated at 70,000 psi for secure fastening in demanding applications
• Optimized thread engagement with partial threading design that provides precise control over clamping force
• Reliable drive performance through Phillips No. 3 drive system, preventing cam-out during installation
• Precision thread compatibility with Class 2A UNC coarse threads ensuring consistent mating with standard components
• Enhanced durability with Rockwell B70 hardness maintaining structural integrity under repeated stress
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These partially threaded pan head screws deliver critical engineering advantages in industrial settings where corrosion resistance and controlled fastening pressure are paramount. The passivated 18-8 stainless steel construction prevents oxidation in moisture-prone environments, while the UNC coarse threading enables rapid assembly without compromising joint integrity. The 5-inch length with partial threading allows engineers to precisely regulate engagement depth, preventing over-tightening in sensitive equipment. The rounded pan head profile distributes clamping force evenly, making these Phillips drive screws ideal for machinery assembly, electrical enclosures, and structural frameworks requiring reliable fastening solutions that maintain performance through thermal cycling and vibration exposure.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerances ensuring precise dimensional accuracy. The 1/4"-20 UNC coarse thread configuration provides optimal performance in general industrial applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe usage across global markets. Material certification confirms 18-8 stainless steel composition with passivated surface treatment for enhanced corrosion protection.