E, E-1, E-1 Special HSS Tap

The HSS Tapered Tap is specifically designed for threading holes to accept E, E-1, and E-1 Special plugs, such as the E-1 Solid Diesel Iron Plug (452-2605-91) and the E-1 Special Ductile Iron Drilled Plug (452-2605-94). This tap is essential for crack repair in castings, ensuring a tight fit when used after the recommended drilling and reaming processes.

The [407-5305-90] E, E-1, E-1 Special HSS Tapered Tap is a high-quality High-Speed Steel (HSS) tap engineered for creating precise tapered threads. This tap is the recommended tool for preparing holes to accept E-series tapered plugs, including:

• E-1 Solid Diesel Iron Plug (Part Number: 452-2605-91)
• E-1 Special Ductile Iron Drilled Plug (Part Number: 452-2605-94)

According to the Diesel Head Repair Catalog, this tapered tap is crucial for applications such as crack repair in castings. By creating accurate tapered threads, it ensures a tight and secure fit with the corresponding E, E-1, and E-1 Special plugs.

Key Features:

• Type: High-Speed Steel (HSS) Tapered Tap
• Compatibility: Designed for E, E-1, and E-1 Special plugs
• Application: Ideal for threading holes in preparation for installing tapered plugs in castings, often used in crack repair.

Recommended Usage:

For optimal performance and extended tap life, it is recommended to use this HSS Tapered Tap after the following steps:

1. Drilling: Use the recommended 9/16 inch HSS Drill (407-5105-90) to create the initial pilot hole.
2. Reaming: Follow drilling with the recommended HSS Tapered Reamer E, E-1, E-1 Special (407-5205-90) to achieve the correct bore size and finish.
3. Tapping: Use the [407-5305-90] HSS Tapered Tap with a good tapping fluid, such as Irontite’s TAP-O, to create the tapered threads.

Using the correct sequence of drilling, reaming, and tapping with this HSS Tapered Tap ensures a precise thread-to-thread fit with E-series plugs, which is essential for effective crack repair and other applications requiring tapered plugs.