S-90403A823 10-32 x 1/4" 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 in high-stress environments
- Enhanced corrosion protection through zinc-plated steel construction for extended service life in industrial conditions
- Optimized torque transmission with Phillips No. 2 drive design for secure installation and reduced cam-out risk
- Precision thread engagement featuring Class 2A UNF fine threads for reliable fastening in demanding applications
- Exceptional mechanical strength delivering 60,000 psi tensile strength and Rockwell B69 hardness for heavy-duty performance
- Secure rounded pan head profile providing low-profile installation with standard tool clearance requirements
- Full thread coverage across the 1/4" length for maximum grip and load distribution
Professional Applications & Engineering Value
These 10-32 UNF zinc-plated steel screws with internal-tooth lock washers are engineered to solve critical vibration-induced loosening problems in industrial machinery, automotive assemblies, and electronic enclosures. The fine thread UNF configuration combined with Class 2A thread fit ensures precise engagement in tapped holes, while the zinc-plated steel construction provides essential corrosion resistance for harsh operating environments. The integrated locking washer maintains clamp force under dynamic loads, making these rounded head Phillips screws ideal for applications where vibration reliability is paramount. The pan head design offers optimal bearing surface while maintaining a low profile for space-constrained assemblies.
Specification Summary & Compliance
This fastener features precision Class 2A thread fit with UNF fine threads (10-32) and right-hand threading. Manufacturing complies with ASME B18.13 specifications for dimensional accuracy and performance. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant for environmental regulations, meeting industrial standards for material composition and safety requirements.
