Import BDNA-20708 Straight Flute Tap 3/8-16 Unc Hss

Product Description

The IMPORT BDNA-20708 is a straight flute plug tap designed for cutting internal right-hand threads in through-holes and moderately deep blind holes. Built from high-speed steel (HSS) with a gold oxide coating, this tap is suited for general-purpose threading in a range of ferrous and non-ferrous materials. It cuts a 3/8-16 UNC thread profile with 4 flutes and carries an H3 thread limit, which controls the tolerance class of the finished thread. Overall length is 2-15/16 inches. Machinists, maintenance technicians, and trade professionals use this tap for field repairs, production threading, and replacement fastener work across industrial and mechanical applications.

This tap is appropriate for hand tapping or machine tapping operations where a standard plug chamfer is suitable. The plug chamfer style — typically 3 to 5 threads of taper — makes it versatile for starting threads in through-holes and for chasing existing 3/8-16 UNC threads. It is commonly used in HVAC equipment assembly, electrical enclosure fabrication, plumbing fixture mounting, and general mechanical maintenance where unified coarse thread fasteners are standard.

Key Features

• 3/8-16 UNC thread form — unified coarse standard for broad fastener compatibility
• 4 straight flutes for efficient chip evacuation in through-hole applications
• Plug chamfer style for versatile starting in through-holes and blind holes
• High-speed steel construction for durability across a range of materials
• Gold oxide coating reduces friction and provides moderate corrosion resistance
• H3 thread limit for controlled thread tolerance in standard fitment applications

Compatibility

Designed as a standard replacement or field-use tap for any application requiring a 3/8-16 UNC right-hand thread in general mechanical, industrial, or trade service work.

Installation Notes

This tap should be installed in a proper tap wrench or tapping head rated for the thread size. Always apply cutting fluid appropriate to the workpiece material before and during tapping to prevent galling and extend tool life. Back the tap out periodically to break and clear chips, especially in deeper holes. Follow applicable workplace safety standards and ensure the workpiece is securely fixtured before beginning any threading operation.