Eagle Cutting Tool HT-4375-20-P-I Hand Plug Tap 7/16-20

Product Description

The EAGLE CUTTING TOOL HT-4375-20-P-I is a 7/16-20 UNF hand plug tap manufactured from high-speed steel (HSS). It is used to cut internal threads in metal workpieces by hand, producing a 7/16-inch diameter thread with a 20 threads-per-inch pitch in the fine thread series. The plug chamfer style — typically 3 to 5 threads of lead — makes it the most common tap for through-holes and the starting point for most threading jobs in manufacturing, maintenance, and repair environments. Machinists, pipefitters, and maintenance technicians reach for this tap when cutting or restoring fine threads in steel, aluminum, and similar metals.

This tap is suited for general-purpose threading in industrial, commercial, and maintenance settings. The 7/16-20 UNF size is widely used in automotive, aerospace, and equipment repair applications where a fine thread pitch provides superior holding strength and precise adjustment over coarse thread alternatives. It is intended for hand-tapping operations using a standard tap wrench or T-handle.

Key Features

• 7/16-20 UNF thread form — fine pitch for high holding strength
• High-speed steel (HSS) construction for durability across a range of metals
• Plug chamfer style suitable for through-holes and most general threading tasks
• Hand-tap design compatible with standard tap wrenches and T-handles
• Minimum order quantity of 1 — available as a single unit

Compatibility

Designed as a general-purpose hand plug tap for use in any application requiring 7/16-20 UNF internal threads. Compatible with standard tap wrenches sized for the tap's square drive.

Installation Notes

A licensed machinist or experienced maintenance technician should perform tapping operations. Always use an appropriate cutting fluid or tapping compound when threading steel or other hard metals to extend tap life and improve thread quality. Secure the workpiece firmly before beginning and keep the tap perpendicular to the work surface throughout the operation. Reverse the tap periodically to break chips and prevent binding or breakage.

Technical Specifications

• Thread Size: 7/16-20 UNF
• Material: High-Speed Steel (HSS)
• Tap Style: Hand Plug
• Weight: 0.31 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-4375-20-P-I