S-90403A836 10-24 x 1 1/2" ASME B18.13 Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance through the integrated internal-tooth lock washer, preventing loosening in dynamic applications
• Enhanced corrosion protection with zinc-plated steel construction, extending service life in harsh industrial environments
• High-strength performance delivering 60,000 psi tensile strength and Rockwell B69 hardness for reliable load-bearing capacity
• Quick installation efficiency with Phillips No. 2 drive and coarse UNC threads, reducing assembly time and effort
• Secure fastening integrity through fully threaded design and Class 2A thread fit, ensuring consistent engagement
• Broad regulatory compliance meeting ASME B18.13 specifications, RoHS 3, and REACH for global industrial use
• Optimized head design with pan-style rounded profile providing flush seating and improved torque distribution

Professional Applications & Engineering Value

These zinc-plated steel screws with internal-tooth lock washers address critical vibration-induced loosening in machinery, electrical enclosures, and automotive assemblies. The coarse UNC 10-24 threading ensures rapid installation while maintaining Class 2A precision for consistent clamp load. Combined with 60,000 psi tensile strength, they provide reliable performance in high-stress applications where vibration resistance is paramount. The Phillips pan head design offers superior drive engagement while the integrated locking system eliminates the need for separate washers, streamlining inventory and assembly processes for industrial maintenance and OEM production lines.

Specification Summary & Compliance

Manufactured to ASME B18.13 standards with Class 2A thread fit and UNC coarse threads. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. Features include 1-1/2" length, 0.19" thread diameter, and integrated internal-tooth lock washer with 0.383" OD.