Import BDNA-20711 Straight Flute Tap 9/16-12 Unc

Product Description

The IMPORT BDNA-20711 is a straight flute plug tap designed for cutting internal threads in through-holes and shallow blind holes. Built from high-speed steel (HSS) with a gold oxide coating, it cuts 9/16-12 UNC right-hand threads with four flutes and an H3 thread limit for consistent fit and dimensional accuracy. The overall length measures 3-19/32 inches. This tap is suited for use in machine shop, maintenance, and field repair applications where standard UNC threads are required. Machinists, maintenance technicians, and trade professionals use this tap in drill presses, lathes, CNC machines, or with a tap wrench for hand tapping.

The BDNA-20711 is applicable to general metalworking tasks requiring 9/16-12 UNC internal threads. The plug chamfer — typically 3 to 5 threads of lead — makes it effective for starting threads in through-holes as well as moderately deep blind holes. It is commonly used in HVAC equipment assembly, structural fabrication, machinery repair, and similar industrial trades where 9/16-inch coarse-thread fasteners are standard.

Key Features

• 9/16-12 UNC thread form for coarse-thread fastener applications
• High-speed steel construction for durability across steel, iron, and non-ferrous metals
• Gold oxide coating reduces friction and improves lubricity during cutting
• Plug chamfer provides easy thread starting in through-holes and shallow blind holes
• H3 thread limit ensures dimensional tolerance consistency
• 4-flute design provides chip clearance and stable cutting action

Compatibility

Designed as a standard replacement or working tap for any application requiring 9/16-12 UNC right-hand internal threads. Fits standard tap holders and collets sized for the 9/16-12 shank.

Installation Notes

Tapping operations should be performed by a qualified machinist or maintenance technician following standard shop safety procedures. Always use an appropriate cutting fluid or tapping compound for the material being threaded to extend tap life and improve thread quality. Secure the workpiece firmly and align the tap perpendicular to the hole before beginning to cut. Advance the tap in short increments and reverse periodically to break chips and prevent tap breakage.