Eagle Cutting Tool HT-16250-8-P-I Hss Hand Plug Tap 1-5/8 8 Tpi

Product Description

The EAGLE CUTTING TOOL HT-16250-8-P-I is a high-speed steel (HSS) hand plug tap designed for cutting internal threads in a range of metalworking and industrial applications. Built to a 1-5/8 inch diameter with an 8 threads-per-inch (TPI) thread pitch, this import-grade tap is suited for threading large-diameter holes by hand or with a tap wrench. The plug chamfer style — typically 3 to 5 threads of lead-in — makes it well-suited for through-holes and blind holes where a starting chamfer aids alignment and controlled cutting force. HSS construction provides the hardness and wear resistance needed for threading steel, cast iron, aluminum, and similar materials.

This tap is used in heavy industrial, maintenance, and fabrication environments where large-diameter threading is required. Typical applications include threading bolt holes in structural components, heavy machinery frames, flanges, and similar assemblies. The 1-5/8 inch-8 thread form is consistent with coarse-thread patterns used across industrial and mechanical fastener standards. This tap is installed by hand using a standard tap wrench sized for large-diameter taps, making it appropriate for job-site repair, machine shop work, and maintenance operations where powered tapping equipment is not available or practical.

Key Features

• 1-5/8 inch diameter, 8 TPI thread specification for large-diameter internal threading
• Plug chamfer geometry provides controlled lead-in for through-holes and accessible blind holes
• High-speed steel (HSS) construction delivers hardness and wear resistance across common metals
• Hand-tap design compatible with standard large-size tap wrenches
• Import-grade option provides a cost-effective solution for general-purpose threading tasks

Compatibility

Designed as a general-purpose hand plug tap for use in standard large-diameter threading operations consistent with 1-5/8 inch-8 TPI thread form requirements.

Installation Notes

This tap is installed by a machinist or qualified tradesperson using a properly sized hand tap wrench. Always secure the workpiece and ensure the tap is started square to the hole to prevent tap breakage or cross-threading. Apply cutting fluid appropriate for the workpiece material to reduce heat and extend tap life. Back off the tap periodically to break chips, especially in deep or blind holes.

Technical Specifications

• Thread Diameter: 1-5/8 inches
• Threads Per Inch (TPI): 8
• Tap Style: Hand Plug
• Material: High-Speed Steel (HSS)
• Weight: 4.2 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-16250-8-P-I