S-91773A213 8-32 x 4" ASME B18.6.3 Stainless Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long-term reliability in harsh industrial environments
• Superior mechanical strength delivering 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
• Optimized drive engagement with Phillips No. 2 drive style ensuring secure installation and reduced cam-out risk
• Precision thread performance featuring UNC coarse threads with Class 2A fit for reliable fastening and vibration resistance
• Versatile partial threading allowing unthreaded shank sections for precise clamping and alignment in assembly operations
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing and global market acceptance

Professional Applications & Engineering Value

These 8-32 UNC coarse thread screws with rounded head Phillips drive provide engineered solutions for industrial assembly challenges where corrosion resistance and mechanical integrity are paramount. The 18-8 stainless steel construction, enhanced by passivated finish, delivers superior protection against chemical exposure and atmospheric corrosion in manufacturing facilities, marine applications, and food processing equipment. The partially threaded design enables precise joint control, while the coarse thread pitch ensures rapid installation and superior vibration resistance in high-stress environments. With 4-inch length and Class 2A thread fit, these fasteners maintain dimensional stability across temperature variations, making them ideal for structural frameworks, machinery assembly, and electronic enclosures requiring reliable, long-term fastening performance.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit per UNC standards with dimensional compliance to ASME B18.6.3 specifications. The manufacturing process ensures precise thread diameter of 0.164" and minimum thread length of 1-1/2" on the 4-inch overall length. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, confirming environmental safety and material restrictions adherence for global industrial applications.