S-90403A152 6-32 x 7/8" ASME B18.13 Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Enhanced vibration resistance with integrated internal-tooth lock washer that maintains secure fastening under dynamic loads
• Superior corrosion protection through zinc-plated steel construction for extended service life in harsh environments
• High tensile strength performance rated at 60,000 psi ensures reliable fastening in demanding applications
• Optimized drive engagement with Phillips No. 2 drive for efficient installation and reduced cam-out risk
• Precise thread compatibility with UNC coarse threading and Class 2A fit for consistent engagement with standard nuts
• Full-thread design advantage provides maximum grip length and holding power along the entire fastener
• Regulatory compliance assurance meeting ASME B18.13 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These zinc-plated steel pan head screws with internal-tooth lock washers deliver exceptional engineering value in industrial settings where vibration-induced loosening compromises assembly integrity. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable performance in heavy-duty applications, while the UNC coarse threads with Class 2A fit provide consistent engagement with mating components. The Phillips drive system enables efficient installation in confined spaces, and the integrated locking mechanism eliminates the need for separate anti-vibration components, reducing assembly time and inventory complexity. These fully threaded screws are particularly valuable in machinery, electrical enclosures, and transportation equipment where maintaining clamp load under dynamic conditions is critical.

Specification Summary & Compliance

This 6-32 x 7/8" screw features precise UNC coarse threading with Class 2A thread fit tolerance for reliable engagement. Manufacturing complies with ASME B18.13 specifications ensuring dimensional accuracy and performance consistency. The product meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations for chemical safety. The zinc-plated steel construction provides corrosion resistance while maintaining the mechanical properties required for industrial applications.