S-90403A196 8-32 x 5/8" 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: Integrated internal-tooth lock washer prevents loosening under dynamic loads, ensuring long-term joint integrity in high-vibration environments.
- Enhanced Corrosion Protection: Zinc-plated steel construction provides a durable barrier against rust and corrosion, extending service life in demanding industrial conditions.
- High Tensile Strength: Rated at 60,000 psi tensile strength and Rockwell B69 hardness for reliable performance in heavy-duty applications requiring robust fastening.
- Optimized Drive Engagement: Phillips No. 2 drive style offers secure tool engagement and reduces cam-out risk during installation, improving assembly efficiency.
- Excellent Thread Grip: UNC coarse thread profile with Class 2A fit ensures quick assembly and strong holding power in various materials.
- Full Thread Coverage: Fully threaded design maximizes grip length and load distribution across the entire fastener for enhanced clamping force.
- Regulatory Compliance: Meets ASME B18.13 specifications and environmental standards (RoHS 3, REACH) for safe use in regulated industries.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these zinc-plated steel screws with internal-tooth lock washers solve critical vibration-induced loosening problems in machinery, automotive assemblies, and electrical enclosures. The UNC coarse thread combined with Class 2A thread fit provides rapid installation and reliable holding power in both metal and plastic substrates. The Phillips pan head design offers a low-profile seating surface while the integrated locking mechanism maintains clamp load integrity without requiring separate washers. With 60,000 psi tensile strength and corrosion-resistant plating, these fully threaded screws deliver consistent performance in applications where vibration resistance and regulatory compliance are paramount.
Specification Summary & Compliance
This 8-32 x 5/8" screw features precision UNC coarse threads with Class 2A thread fit for consistent engagement. Manufacturing complies with ASME B18.13 standards for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors.
