S-90402A242 10-24 x 1/2" ASME B18.13 Steel Pan Head Phillips Screws with External-Tooth Lock Washer
Steel Pan Head Phillips Screws with External-Tooth Lock Washer
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments
- Exceptional holding power from 60,000 psi tensile strength and Rockwell B69 hardness, preventing fastener failure under stress
- Vibration-resistant locking through the integrated external-tooth lock washer, maintaining secure connections in dynamic applications
- Easy installation and removal with Phillips No. 2 drive and standard pan head design, reducing assembly time and tool requirements
- Reliable thread engagement with UNC coarse threads and Class 2A fit, providing consistent performance across multiple installations
- Full-threaded design offering maximum grip length and uniform stress distribution along the entire fastener
- Regulatory compliance assurance meeting ASME B18.13 specifications and environmental standards for global industrial use
Professional Applications & Engineering Value
These zinc-plated steel pan head screws with external-tooth lock washers provide critical vibration resistance in machinery, electrical enclosures, and automotive assemblies where loosening under dynamic loads is a primary concern. The coarse UNC threading and Class 2A thread fit ensure rapid installation and reliable performance in materials where fine threads might strip or fail. The combination of 60,000 psi tensile strength and Rockwell B69 hardness makes these fully threaded screws ideal for applications requiring repeated disassembly and reassembly without compromising thread integrity. The zinc plating offers essential corrosion protection for industrial environments exposed to moisture, chemicals, or temperature variations.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread tolerance and UNC coarse thread profile. Compliant with ASME B18.13 manufacturing specifications, ensuring consistent quality and interchangeability. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for restricted substances, making these screws suitable for global supply chains and environmentally conscious manufacturing operations.
