S-90403A197 8-32 x 3/4" ASME B18.13 Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer
Steel Pan Head Phillips Screws with Internal-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 vibration resistance with integrated internal-tooth lock washer that prevents loosening under dynamic loads
- Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
- Optimized drive engagement with Phillips No. 2 drive for efficient installation and reduced cam-out risk
- Reliable thread performance featuring UNC coarse threads with Class 2A fit for secure fastening in various materials
- Maximum load-bearing capacity with 60,000 psi tensile strength and Rockwell B69 hardness for heavy-duty applications
- Full-thread engagement along the entire 3/4" length for superior holding power and distribution of stress
- Industry-standard compliance meeting ASME B18.13 specifications for consistent quality and interchangeability
Professional Applications & Engineering Value
These zinc-plated steel screws with internal-tooth lock washers deliver critical vibration resistance in demanding industrial environments where mechanical stability is paramount. The combination of UNC coarse threading and Class 2A thread fit ensures reliable installation in various substrates while maintaining precise tolerances. The Phillips pan head design provides a low-profile fastening solution with excellent drive engagement, reducing installation time and tool slippage. Engineered with 60,000 psi tensile strength and Rockwell B69 hardness, these fully threaded 8-32 x 3/4" screws withstand substantial mechanical stresses in machinery assembly, electrical enclosures, and automotive components where vibration-induced loosening would compromise system integrity.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread profile (8-32 thread size). These rounded head screws feature a standard pan head profile with 0.322" diameter and comply with ASME B18.13 manufacturing specifications. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring suitability for regulated industrial applications worldwide.
