S-90402A151 6-32 x 3/4" ASME B18.13 Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with integrated external-tooth lock washers that maintain tight clamping force under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in industrial environments
• Optimized drive engagement with Phillips No. 2 drive system ensuring efficient installation and reduced cam-out risk
• Reliable thread performance through UNC coarse threads with Class 2A fit for consistent engagement and reduced cross-threading
• High-strength fastening solution delivering 60,000 PSI tensile strength and Rockwell B69 hardness for demanding applications
• Full-thread design advantage providing maximum grip length and uniform stress distribution along the entire fastener
• Regulatory compliance assurance meeting ASME B18.13 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

These zinc-plated steel screws with external-tooth lock washers address critical vibration-induced loosening challenges in industrial machinery, electrical enclosures, and automotive assemblies. The UNC coarse thread configuration ensures rapid installation and reliable performance in materials where fine threads might strip, while the Class 2A thread fit provides optimal clearance for production efficiency without compromising joint integrity. The Phillips pan head design offers a low-profile fastening solution with excellent drive transfer, making these fully threaded screws ideal for applications requiring consistent clamping force across the entire engagement length. The combination of 60,000 PSI tensile strength and Rockwell B69 hardness ensures these fasteners maintain their mechanical properties under sustained loads, while the zinc plating provides essential corrosion resistance for extended service life in demanding environments.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications (6-32 thread size, 3/4" length). These screws conform to ASME B18.13 manufacturing standards and demonstrate compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The external-tooth lock washers (0.285" OD, 0.02" thickness) are integrally assembled to the zinc-plated steel construction, ensuring consistent performance meeting industrial fastening requirements.