S-90402A148 6-32 x 1/2" 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 washer that maintains secure fastening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in demanding environments
• Optimized drive engagement with Phillips No. 2 drive style ensuring efficient installation and reduced cam-out risk
• Reliable thread performance featuring UNC coarse threads with Class 2A fit for consistent engagement and easy assembly
• High mechanical strength delivering 60,000 psi tensile strength and Rockwell B69 hardness for demanding applications
• Complete thread coverage with fully threaded design providing maximum grip length and holding power
• Industry compliance assurance meeting ASME B18.13 specifications and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

These zinc-plated steel screws with integrated external-tooth lock washers provide critical vibration resistance in industrial assemblies where loosening under dynamic loads poses significant reliability concerns. The UNC coarse thread configuration with Class 2A fit ensures rapid installation while maintaining precise tolerances, reducing assembly time in high-volume manufacturing. The Phillips pan head design offers a low-profile solution with excellent drive engagement, while the fully threaded construction maximizes surface contact for superior pull-out resistance. Engineered for machinery, electrical enclosures, and automotive components, these 6-32 screws deliver consistent performance where vibration damping and secure fastening are paramount to operational safety and equipment longevity.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread profile (6-32 specification). Compliant with ASME B18.13 manufacturing specifications for mechanical fasteners. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements for restricted substances. The zinc-plated steel construction provides corrosion resistance while maintaining the specified mechanical properties of 60,000 psi tensile strength and Rockwell B69 hardness.