S-94059A311 12-24 x 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Integrated steel/rubber sealing washer creates weather-tight seals and prevents loosening from vibration
• No. 5 drill tip design enables self-drilling capability up to 1/2" thickness, eliminating pre-drilling steps
• Thread forming (CSD) technology creates stronger, more secure threads in steel and sheet metal applications
• External hex drive provides high torque transmission for fast, secure installation
• UNC coarse threading ensures rapid installation and superior pull-out resistance
• Fully threaded shank maximizes grip length and distributes load evenly across the entire fastener

Professional Applications & Engineering Value

These 12-24 zinc-plated steel tapping screws are engineered specifically for demanding steel and sheet metal applications where vibration resistance and environmental sealing are critical. The thread forming (CSD) design displaces material rather than removing it, creating stronger, more durable threads that won't strip under stress. The integrated steel/rubber sealing washer provides dual functionality - the steel base distributes clamping force evenly while the rubber component creates a weather-resistant barrier against moisture and contaminants. With No. 5 drill tip and 1/2" maximum drilling capacity, these UNC coarse thread screws significantly reduce installation time by eliminating separate drilling operations, making them ideal for high-volume assembly lines and construction projects where efficiency and reliability are paramount.

Specification Summary & Compliance

This 12-24 thread forming screw features UNC coarse threading with standard Class 2A thread tolerances for consistent performance. The 1-1/4" fully threaded design with external hex drive and right-hand thread direction complies with industrial fastening standards. Manufactured from zinc-plated steel with a 0.563" OD flat washer combining steel and rubber components, these screws meet general industry specifications for tapping screw applications in metal fabrication and construction environments.