S-90402A246 10-24 x 5/8" ASME B18.13 Steel Pan Head Phillips Screws with External-Tooth Lock Washer

Key Features & Benefits at a Glance

• Vibration-resistant fastening with integrated external-tooth lock washer prevents loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
• Superior driving torque transmission via Phillips No. 2 drive for efficient installation with standard tools
• Optimized thread engagement with UNC coarse threads and Class 2A fit ensures reliable clamping force
• High-strength performance delivering 60,000 psi tensile strength and Rockwell B69 hardness for demanding applications
• Full-thread design maximizes grip length and distributes stress evenly across the fastener
• Regulatory compliance meets ASME B18.13 specifications and environmental standards (RoHS 3, REACH)

Professional Applications & Engineering Value

These zinc-plated steel screws with external-tooth lock washers provide critical vibration resistance in industrial assemblies where dynamic loads threaten joint integrity. The UNC coarse thread configuration enables rapid installation while maintaining Class 2A precision for consistent clamping force. The Phillips pan head design offers a low-profile solution with excellent drive torque capability, making these fully threaded screws ideal for machinery, electrical enclosures, and automotive components where 60,000 psi tensile strength ensures structural reliability. The combination of zinc plating and lock washer technology addresses common failure modes in vibration-prone environments.

Specification Summary & Compliance

Manufactured to ASME B18.13 standards with Class 2A thread fit for precise dimensional control. Features 10-24 UNC coarse threads with right-hand direction and 5/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Mechanical properties include 60,000 psi tensile strength and Rockwell B69 hardness.