Value Collection JY4917100 Straight Flute Tap 3/4-10 Unc

Product Description

The VALUE COLLECTION JY4917100 is a straight flute plug tap designed for cutting 3/4-10 UNC internal left-hand threads in through-holes and blind holes where chip evacuation is manageable. Constructed from high-speed steel with a bright uncoated finish, this tap is suited for general-purpose threading in softer steels, aluminum, brass, and plastics. The plug chamfer provides a gradual cutting entry with 3 to 5 chamfered threads, making it the standard choice for most production and maintenance tapping applications. At 4.25 inches overall length, the JY4917100 accommodates standard tap handles and machine holders for both hand and machine tapping operations.

This tap is intended for machinists, maintenance technicians, and toolroom professionals working on equipment requiring left-hand threaded fasteners. Left-hand thread taps are commonly used on rotating shaft assemblies, turnbuckles, and applications where standard right-hand threads would loosen under operational torque. The 4-flute straight flute geometry is well suited for use in CNC machining centers, drill presses, and hand tapping setups in ferrous and non-ferrous materials. The H3 thread limit provides a controlled tolerance fit for standard UNC class 2B and 3B thread requirements.

Key Features

• Left-hand thread direction for applications requiring reverse-threaded fasteners
• Plug chamfer with 3 to 5 leading threads for smooth entry and balanced cutting load
• High-speed steel construction provides good wear resistance in general machining applications
• H3 thread limit ensures consistent tolerance control for UNC class 2B and 3B fits
• Bright uncoated finish suitable for use with standard cutting fluids across a range of workpiece materials
• 4-flute straight flute design compatible with standard tap holders and tapping heads

Compatibility

Designed as a standard replacement or toolroom tap for applications requiring a 3/4-10 UNC left-hand thread in a plug chamfer configuration. Fits standard 3/4-inch tap holders and drive squares used in manual and machine tapping setups.

Installation Notes

Threading operations should be performed by a qualified machinist or maintenance technician familiar with proper tap speeds, feeds, and lubrication requirements for the workpiece material. Always use an appropriate cutting fluid to extend tool life and improve thread quality. Secure the workpiece firmly before tapping to prevent movement that could break the tap. Left-hand taps rotate counterclockwise to cut — verify spindle or tap handle direction before engaging the workpiece.