Import BDNA-20713 Straight Flute Tap 3/4-10 Unc Hss

Product Description

The IMPORT BDNA-20713 is a straight flute tap designed for cutting internal 3/4-10 UNC threads in a wide range of materials. Built from high-speed steel (HSS) with a gold oxide coating, this tap offers improved lubricity and surface hardness compared to uncoated tooling. The plug chamfer style — featuring a gradual lead-in over several threads — makes it well suited for through-hole tapping applications. With 4 flutes and a right-hand thread direction, the BDNA-20713 is a standard production tap intended for use by machinists, maintenance technicians, and trade professionals working with threaded fastener applications.

This tap is used in metalworking and maintenance-repair-overhaul (MRO) contexts where a 3/4-10 UNC internal thread must be cut or chased. The plug chamfer design works in both through holes and moderately deep blind holes when chip clearance is adequate. At 4-1/4 inches overall length (OAL), it accepts standard tap handles and machine tap holders appropriate for this size range. Typical applications include fabrication shops, industrial maintenance, HVAC equipment repair, and mechanical trades requiring field or bench tapping of ferrous and non-ferrous workpieces.

Key Features

• 3/4-10 UNC thread form for cutting standard coarse-pitch internal threads
• High-speed steel construction provides toughness and wear resistance across common workpiece materials
• Gold oxide coating reduces friction and improves chip flow during the tapping operation
• Plug chamfer (H3 thread limit) delivers consistent fit for standard tolerance threaded assemblies
• 4-flute straight design compatible with tap handles and machine tapping attachments
• Right-hand thread direction for conventional clockwise cutting

Compatibility

Designed as a standard replacement or production tap for any application requiring a 3/4-10 UNC internal thread; fits standard tap wrenches and machine holders sized for 3/4-inch taps.

Installation Notes

Tapping should be performed by a qualified machinist or maintenance technician using the correct tap drill size for a 3/4-10 UNC thread prior to use. Always apply appropriate cutting fluid to extend tap life and reduce the risk of breakage. Secure the workpiece firmly before beginning the tapping operation and maintain proper axial alignment throughout. Reverse the tap periodically to break chips and prevent binding, particularly in deeper holes.