Import BDNA-20688 Tap Set 9/16-12 Unc Hss Gold Oxide

Product Description

The IMPORT BDNA-20688 is a 3-piece tap set designed for cutting 9/16-12 UNC internal threads in metal workpieces. The set includes bottoming, plug, and taper chamfer taps, allowing machinists and maintenance technicians to start, advance, and finish threads in through-holes or blind holes in a single complete operation. Each tap features 4 flutes ground from High Speed Steel (HSS) with a gold oxide finish that helps reduce friction and resist corrosion during cutting. The H3 thread limit and Class 3B fit designation indicate a standard tolerance range suitable for general-purpose threaded fastener applications in industrial and mechanical assembly work.

This tap set is suited for use in machine shops, maintenance facilities, and manufacturing environments where 9/16-12 UNC threads are required. The right-hand thread configuration covers the most common fastener orientation. The 3-piece chamfer combination makes it practical for both through-hole and blind-hole applications, reducing the need for separate tap purchases when working across varied job conditions. It is typically used by machinists, millwrights, and industrial maintenance technicians.

Key Features

• 3-piece set includes bottoming, plug, and taper taps for complete thread-cutting in one kit
• High Speed Steel (HSS) construction for durability in ferrous and non-ferrous metals
• Gold oxide finish reduces friction and provides light corrosion resistance during use
• 4-flute design promotes chip clearance and thread accuracy
• H3 thread limit with Class 3B fit for standard general-purpose tolerance
• Right-hand thread direction, 9/16-12 UNC standard

Compatibility

Designed for cutting 9/16-12 UNC right-hand internal threads in standard through-hole and blind-hole applications across general industrial and mechanical assembly work.

Installation Notes

Tap installation should be performed by qualified machinists or maintenance technicians familiar with proper tapping procedures. Always secure the workpiece and use appropriate cutting fluid to extend tap life and improve thread quality. Apply consistent, steady pressure and back the tap off periodically to break chips, particularly in blind holes. Inspect threads with a go/no-go gauge after tapping to verify fit before assembly.