S-91775A690 Length 3/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide Steel finish, extending service life in demanding industrial environments.
• Effortless installation using a standard No. 2 Phillips drive, reducing assembly time and tool wear.
• Reliable thread forming action creates strong, permanent threads in sheet metal without pre-tapping, minimizing loosening.
• Flush, professional finish with an undercut oval head and 82° countersink angle for a secure, vibration-resistant fit.
• Optimized for sheet metal applications, with a 0.164" thread diameter and 15 TPI for high pull-out strength in thin materials.
• Full-length threading ensures maximum grip along the entire 3/8" length, providing consistent clamping force.
• Compliance with global standards including RoHS 3 and REACH, ensuring safe, environmentally responsible sourcing for your projects.

Professional Applications & Engineering Value

This No. 8 x 3/8" Black-Oxide Steel Oval Head Phillips Tapping Screw is engineered specifically for sheet metal fastening, where its thread forming design excels. By displacing material rather than cutting it, the screw forms robust, load-bearing threads that resist vibration and shock, a common failure point in dynamic assemblies. The undercut oval head sits flush within an 82° countersink, eliminating protrusions and reducing snag risks in enclosures or machinery. Made from durable Black-Oxide Steel, it offers enhanced resistance to rust in humid or mildly corrosive settings, making it ideal for HVAC systems, electronic chassis, and automotive panels. The Phillips No. 2 drive ensures compatibility with common tools, streamlining production lines while the pointed tip facilitates quick alignment and starts, cutting down on installation errors and rework.

Specification Summary & Compliance

This screw features a No. 8 size with a 0.164" thread diameter and 15 TPI in a right-hand thread direction, fully threaded for consistent performance. It conforms to Thread Forming (Type A/AB) standards and is designed for use with a No. 29 drill bit (0.136" diameter) in materials up to 0.025" thick. The product is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of restricted substances for global industrial use.