S-90403A147 6-32 x 7/16" 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
- Enhanced vibration resistance with integrated internal-tooth lock washer that prevents loosening under dynamic loads
- Superior corrosion protection through zinc-plated steel construction for extended service life in harsh environments
- Optimized drive engagement with Phillips No. 2 drive system providing reliable torque transmission
- Maximum thread engagement through fully threaded UNC coarse spacing design for superior holding power
- Precision thread compatibility with Class 2A thread fit ensuring consistent mating with standard components
- High mechanical strength delivering 60,000 psi tensile strength and Rockwell B69 hardness for demanding applications
- Streamlined assembly with pan head profile offering low-profile installation and washer integration
Professional Applications & Engineering Value
These zinc-plated steel screws with internal-tooth lock washers provide critical vibration-resistant fastening solutions for industrial equipment, electrical enclosures, and machinery assemblies. The combination of UNC coarse threading and Class 2A thread fit ensures rapid installation while maintaining precise tolerances for repeated disassembly and reassembly cycles. The Phillips pan head design with integrated washer eliminates separate component handling, reducing assembly time and preventing lost hardware. With 60,000 psi tensile strength, these fully threaded screws deliver reliable performance in high-stress applications where vibration-induced loosening would compromise system integrity.
Specification Summary & Compliance
Manufactured to ASME B18.13 specifications with Class 2A thread fit tolerance for consistent mating performance. Features UNC coarse thread (6-32) with right-hand direction and fully threaded 7/16" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors. The internal-tooth lock washer (0.288" OD) is integrally formed from zinc-plated steel for unified corrosion protection.
