S-90403A831 10-32 x 3/4" ASME B18.13 Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated internal-tooth lock washers that maintain tight fastening under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction for reliable performance in industrial environments
• High tensile strength of 60,000 psi ensures secure, long-lasting connections in demanding applications
• Precise Class 2A thread fit guarantees smooth installation and consistent engagement with mating components
• Optimized Phillips No. 2 drive design provides efficient torque transfer and reduces cam-out during installation
• Fully threaded UNF fine thread configuration delivers maximum grip length and superior holding power
• Rockwell B69 hardness rating maintains structural integrity and prevents deformation under stress

Professional Applications & Engineering Value

These zinc-plated steel screws with internal-tooth lock washers solve critical vibration-induced loosening challenges in industrial assembly. The combination of UNF fine threads and Class 2A fit ensures precise engagement in machinery, electrical enclosures, and automotive components where vibration resistance is paramount. The Phillips pan head design with integrated washer provides a flush mounting solution while the 60,000 psi tensile strength maintains joint integrity under cyclic loading. Ideal for industrial maintenance, equipment manufacturing, and electronic chassis assembly where reliable, vibration-proof fastening is essential for operational safety and reduced downtime.

Specification Summary & Compliance

Manufactured to ASME B18.13 specifications with Class 2A thread fit and UNF 10-32 fine threading. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features include right-hand thread direction, fully threaded design, and precise dimensional control with 0.19" thread diameter and 3/4" length.