Value Collection JY9039710 Straight Flute Tap 11/16-18 Uns

Product Description

The VALUE COLLECTION JY9039710 is a straight flute tap designed for cutting 11/16-18 UNS internal threads in a left-hand direction. Manufactured from high-speed steel (HSS) with a bright/uncoated finish, this tap delivers reliable performance in a range of ferrous and non-ferrous materials. The plug chamfer style provides 3 to 5 chamfered lead threads, making it suitable for through-hole tapping applications where the tap can pass fully through the workpiece. With 4 flutes and an H3 thread limit, this tool maintains consistent tolerance control in standard production and repair threading operations.

This tap is used in machining environments where left-hand threaded fasteners or assemblies are required — common in applications where reverse-rotation loads could loosen a standard right-hand thread. The 11/16-18 UNS thread form is found in specialized mechanical assemblies and precision components across industrial, hydraulic, and instrumentation work. With a thread length of 1.8125 inches and an overall length of 4.25 inches, it fits standard tap holders and machine spindles used in drill presses, CNC machining centers, and manual mills.

Key Features

• Left-hand thread direction for reverse-rotation fastening applications
• 11/16-18 UNS thread form with H3 thread limit for consistent tolerance control
• Plug chamfer with 3 to 5 lead threads suited for through-hole tapping
• 4-flute geometry provides chip clearance and stable cutting action
• High-speed steel construction handles a broad range of workpiece materials
• Bright/uncoated finish — no additional coating variables to account for in feeds and speeds

Compatibility

Designed as a standard replacement or production tap for applications requiring 11/16-18 UNS left-hand internal threads. Compatible with standard straight-shank tap holders sized for the 11/16-18 thread range.

Installation Notes

Machinist installation is required. Ensure the workpiece is securely fixtured and the tap is properly aligned with the pilot hole before engaging. Power down any machine spindle and verify zero rotation before changing or setting the tap in the holder. Use appropriate cutting fluid for the workpiece material to extend tap life and maintain thread quality — do not run this tap dry in ferrous materials.