Import BDNA-20761 Straight Flute Tap 9/16-18 Unf

Product Description

The IMPORT BDNA-20761 is a straight flute tap designed for cutting right-hand internal threads in a 9/16-18 UNF thread size. Built from high-speed steel (HSS) with a gold oxide coating, this tap delivers reliable performance in ferrous and non-ferrous materials. The plug chamfer style provides a balanced lead-in, making it suitable for through-hole and moderately deep blind-hole applications. With 4 flutes and an H3 thread limit, it maintains consistent dimensional accuracy within standard tolerance class requirements. Overall length is 3-19/32 inches. This tap is used by machinists, maintenance technicians, and trade professionals working with threaded fastener repair or new thread creation.

This tap is suited for general threading operations in machine shops, maintenance facilities, and on-site trade work. The 9/16-18 UNF pitch is common in precision assemblies, automotive, and hydraulic fitting applications where a finer thread pitch is required over the coarser UNC equivalent. The plug chamfer (approximately 3 to 5 thread lead-in) makes it practical for both through holes and blind holes with adequate thread runout. It is intended for use in standard tapping equipment including hand tap wrenches and machine tapping setups.

Key Features

• 9/16-18 UNF thread size with right-hand thread direction
• High-speed steel construction for durability across a range of workpiece materials
• Gold oxide coating reduces friction and provides light corrosion resistance during storage and use
• 4 straight flutes suitable for through-hole and blind-hole threading with chip clearance
• Plug chamfer provides gradual thread lead-in for balanced cutting action
• H3 thread limit ensures consistent tolerance control for standard UNF fits

Compatibility

Designed as a standard replacement or new-installation tap for 9/16-18 UNF threading applications in general metalworking, maintenance, and trade repair work.

Installation Notes

Tapping operations should be performed by qualified machinists or trade technicians familiar with thread-cutting procedures. Always use appropriate cutting fluid to extend tool life and improve thread quality. Ensure the workpiece is securely fixtured before beginning the tapping operation. Follow applicable shop safety practices and wear appropriate PPE including eye protection.