S-90402A821 10-32 x 1/4" 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 vibration resistance with integrated external-tooth lock washer preventing loosening under dynamic loads
- Enhanced corrosion protection through zinc-plated steel construction for extended service life in industrial environments
- High-strength performance with 60,000 psi tensile strength and Rockwell B69 hardness for demanding applications
- Precision thread engagement with Class 2A UNF fine threads ensuring reliable, secure fastening
- Quick installation using No. 2 Phillips drive for efficient assembly with standard tools
- Full-thread design providing maximum grip length and holding power throughout the fastener
- Regulatory compliance meeting ASME B18.13 standards for consistent quality and performance
Professional Applications & Engineering Value
These 10-32 UNF zinc-plated steel screws with external-tooth lock washers deliver exceptional engineering value in vibration-prone applications. The rounded pan head profile with Phillips drive facilitates quick installation while the integrated locking mechanism maintains clamp force in machinery, automotive assemblies, and electrical enclosures. The fine thread configuration provides superior resistance to vibrational loosening compared to coarse threads, while the zinc-plated steel construction offers reliable corrosion protection in industrial environments. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures these fasteners withstand high stress conditions without compromising integrity.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNF fine threads (10-32) and 1/4" length. Compliant with ASME B18.13 specifications for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use. Features fully threaded design with 0.383" OD external-tooth lock washer integrated for immediate vibration resistance.
