S-90403A192 8-32 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 integrated internal-tooth lock washer that maintains secure fastening under dynamic loads
• High tensile strength construction with 60,000 psi rating and Rockwell B69 hardness for reliable performance in demanding applications
• Corrosion-resistant zinc-plated steel provides durable protection against environmental factors in industrial settings
• Easy installation and removal with Phillips No. 2 drive design that accommodates standard tools
• Precise thread engagement with UNC coarse threads and Class 2A fit ensuring consistent performance and compatibility
• Full threading along the 3/8" length delivers maximum grip and holding power across the entire fastener
• Regulatory compliance assurance meeting ASME B18.13 standards while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

These zinc-plated steel rounded head screws with internal-tooth lock washers are engineered to solve critical vibration-induced loosening problems in industrial assemblies. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures reliable performance in high-stress applications where fastener failure is not an option. The UNC coarse threads provide excellent engagement in various materials, while the Phillips drive enables efficient installation with standard tools. Particularly valuable in machinery, equipment manufacturing, and automotive applications, these fully threaded screws maintain consistent clamping force even under continuous vibration, reducing maintenance requirements and improving overall assembly reliability. The zinc plating offers essential corrosion protection, extending service life in challenging industrial environments.

Specification Summary & Compliance

This 8-32 x 3/8" screw features precise Class 2A thread fit with UNC coarse threading and right-hand thread direction. Manufactured to meet ASME B18.13 specifications 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 various industrial sectors. The internal-tooth lock washer component maintains the same zinc-plated steel construction for consistent corrosion resistance throughout the assembly.