S-90403A827 10-32 x 3/8" ASME B18.13 Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Superior vibration resistance with an integrated internal-tooth lock washer that prevents loosening under dynamic loads.
• Enhanced corrosion protection through zinc-plated steel construction, ensuring longevity in harsh environments.
• High tensile strength of 60,000 psi and Rockwell B69 hardness for reliable performance in demanding applications.
• Secure and precise fastening with a fully threaded 10-32 UNF fine thread and Class 2A fit for minimal play.
• Easy installation and removal using a standard Phillips No. 2 drive, reducing assembly time and tool wear.
• Durable rounded pan head design that provides a low-profile, flush finish while distributing clamping force evenly.
• Compliance with industry standards including ASME B18.13, RoHS 3, and REACH for quality assurance and environmental safety.

Professional Applications & Engineering Value

This 10-32 UNF zinc-plated steel screw with an internal-tooth lock washer is engineered to address critical challenges in industrial fastening, such as vibration-induced loosening and corrosion. The fine thread and Class 2A fit ensure precise engagement in materials like metal and plastic, reducing the risk of strip-out and maintaining clamp load under stress. Ideal for machinery, automotive assemblies, and electronic enclosures, the combination of zinc-plated steel and a locking washer delivers a robust, vibration-resistant solution that extends service life and minimizes maintenance downtime in harsh operational environments.

Specification Summary & Compliance

The screw features a 10-32 UNF thread with Class 2A tolerance for accurate fit, fully threaded for consistent holding power. It meets ASME B18.13 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial applications.