Eagle Cutting Tool SP-4375-14-P-I Spiral Point Plug Tap

Product Description

The EAGLE CUTTING TOOL SP-4375-14-P-I is a 7/16-14 high-speed steel (HSS) spiral point plug tap designed for cutting internal threads in through-holes. The spiral point geometry pushes chips forward ahead of the cutting flutes, reducing chip packing and allowing continuous thread cutting at production speeds. This tap carries a plug chamfer, meaning the first few threads are tapered to ease entry and distribute cutting load across multiple teeth. Machinists, pipefitters, and maintenance technicians reach for this style of tap when threading steel, cast iron, aluminum, and similar materials in through-hole applications.

This tap is sized for the 7/16-14 thread form, a Unified National Coarse (UNC) specification commonly found in structural fastening, machinery frames, pipe flanges, and general mechanical assemblies. The plug chamfer makes it suitable as a primary tapping tool when a starting taper tap is not required. It is well suited for use in drill presses, CNC machining centers, and hand-tapping operations where through-hole access is available. Import-grade tooling at this specification is a practical choice for job shops and maintenance operations where volume tap consumption makes cost-per-unit a relevant factor.

Key Features

• 7/16-14 UNC thread form for high-volume structural and mechanical fastener applications
• HSS construction provides hardness and wear resistance suitable for ferrous and non-ferrous materials
• Spiral point geometry drives chips forward through the hole, reducing chip jamming in through-hole operations
• Plug chamfer distributes cutting load over several leading threads for smoother entry
• Minimum order quantity of 1, allowing single-unit purchase for service and maintenance needs

Compatibility

Designed as an OEM-style replacement or direct-use threading tool for any application requiring a 7/16-14 UNC internal thread in through-hole workpieces.

Installation Notes

Tap installation and use should be performed by a qualified machinist or tradesperson following standard threading procedures. Ensure the workpiece is securely fixtured and the correct tap drill size for 7/16-14 UNC is used prior to tapping. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Never force a tap against hard resistance — back off periodically to break chips and prevent tap breakage.

Technical Specifications

• Thread Size: 7/16-14 UNC
• Tap Type: Spiral Point Plug
• Material: High-Speed Steel (HSS)
• Chamfer Style: Plug
• Weight: 0.1 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: SP-4375-14-P-I