S-90402A197 8-32 x 3/4" 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: Integrated external-tooth lock washer prevents loosening under dynamic loads, ensuring reliable fastening in high-vibration environments.
- Enhanced Corrosion Protection: Zinc-plated steel construction provides durable resistance against rust and environmental degradation, extending service life.
- High Tensile Strength: Rated at 60,000 psi tensile strength with Rockwell B69 hardness for robust performance in demanding applications.
- Effortless Installation: No. 2 Phillips drive and fully threaded UNC coarse thread design enable quick, secure assembly with standard tools.
- Precision Thread Fit: Class 2A thread tolerance ensures consistent engagement and reliable clamping force across assemblies.
- Versatile Pan Head Design: Rounded head profile distributes load evenly and accommodates various industrial mounting scenarios.
- Regulatory Compliance: Meets ASME B18.13 specifications and environmental standards including RoHS 3 and REACH for global supply chain compatibility.
Professional Applications & Engineering Value
Engineered for industrial machinery, automotive assemblies, and electrical enclosures, these zinc-plated steel screws address critical vibration-induced loosening and corrosion challenges. The external-tooth lock washer bites into mating surfaces, maintaining clamp load under cyclic stresses, while the UNC coarse thread and fully threaded design provide rapid installation and maximum thread engagement in sheet metal, plastics, and composite materials. The Phillips pan head offers low-profile security with enhanced driver engagement, reducing cam-out during high-torque applications. This combination delivers reliable performance in maintenance, manufacturing, and OEM applications where fastener integrity is non-negotiable.
Specification Summary & Compliance
Manufactured to ASME B18.13 standards with Class 2A thread fit precision. Features 8-32 UNC coarse threads, right-hand threading, and zinc-plated steel construction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions.
