S-90086A671 8-32 x 5/8" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior material durability with Black-Oxide Steel providing excellent corrosion resistance and extended service life in demanding environments.
• Efficient thread cutting design enables self-tapping in materials like aluminum, brass, and cast iron without pre-threading, reducing installation time and labor costs.
• Reliable fastening performance with UNC coarse threads and fully threaded shank ensuring strong, vibration-resistant connections in sheet metal and other industrial applications.
• User-friendly installation featuring a Phillips No. 2 drive and standard flat head profile for easy driving and a flush finish with an 82° countersink angle.
• Precision compatibility with No. 26 drill bit (0.147" diameter) for accurate hole preparation, minimizing errors and enhancing assembly efficiency.
• Broad material adaptability designed for use in aluminum, brass, cast iron, and sheet metal, offering versatile solutions for various metalworking projects.
• Compliance assurance meeting ASME B18.6.3 standards and RoHS 3 regulations, ensuring quality, safety, and environmental responsibility.

Professional Applications & Engineering Value

These 8-32 UNC thread cutting tapping screws are engineered to address common industrial challenges, such as material fatigue and installation inefficiencies. The Black-Oxide Steel construction enhances corrosion resistance, while the thread cutting design (Type F) allows for direct tapping into tough materials like aluminum, brass, and cast iron without stripping threads. This reduces the need for additional tools and speeds up assembly in sheet metal fabrication, HVAC systems, and machinery enclosures. The coarse thread spacing and fully threaded profile ensure a secure grip, preventing loosening under vibration and improving load distribution. With a Phillips drive and flat head, these screws offer easy, flush mounting, making them ideal for applications where surface aesthetics and structural integrity are critical in industrial and metalworking settings.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a size of 8-32 and coarse spacing, ensuring precise fit and interchangeability. It meets ASME B18.6.3 specifications for dimensional accuracy and performance, and is RoHS 3 (2015/863/EU) compliant, confirming it is free from hazardous substances. The design includes a standard flat head with an 82° countersink angle and is fully threaded for consistent fastening. Manufactured for use with a No. 26 drill bit, it supports reliable hole preparation in compliance with industry norms for thread cutting screws in metal applications.