Import BDNA-20695 Tap Set 7/8-14 Unf Hss Gold Oxide 3 Pc

Product Description

The IMPORT BDNA-20695 is a 3-piece tap set designed for cutting 7/8-14 UNF internal threads in metal workpieces. The set includes bottoming, plug, and taper chamfer taps, allowing machinists and trade professionals to start, advance, and finish threads in a single coordinated workflow. Each tap features 4 flutes ground from high-speed steel (HSS) and carries a gold oxide finish that provides light lubricity and corrosion resistance during use. Overall length is 4-11/16 inches. The H4 thread limit designation indicates a tolerance class suited for general-purpose UNF threading applications where moderate fit and clearance are required.

This tap set is suited for threading operations on ferrous and non-ferrous metals in maintenance, repair, and manufacturing environments. The 7/8-14 UNF thread specification is common in hydraulic fittings, automotive components, and precision mechanical assemblies where fine-pitch threads are required for vibration resistance or tight sealing. The three-chamfer configuration makes the set appropriate for both through-hole and blind-hole applications.

Key Features

• 3-piece set includes bottoming, plug, and taper taps for complete threading sequences
• 7/8-14 UNF thread specification for fine-pitch internal threading
• 4-flute design provides efficient chip evacuation and thread formation
• High-speed steel construction for durability across a range of metal workpieces
• Gold oxide finish reduces friction and provides light corrosion protection
• H4 thread limit for general-purpose UNF fit and clearance

Compatibility

Designed for cutting 7/8-14 UNF threads per standard UNF thread specifications. Suitable for use in drill presses, lathes, and hand-tapping operations where 7/8-14 fine-pitch internal threads are required.

Installation Notes

Tap installation and thread cutting should be performed by qualified machinists or trade professionals familiar with tapping speeds, lubrication requirements, and workpiece fixturing. Always secure the workpiece firmly before beginning the tapping operation and use an appropriate cutting fluid for the material being threaded. Begin with the taper tap to start the thread, progress to the plug tap, and finish with the bottoming tap when threading to the bottom of a blind hole. Inspect each tap for wear or chipping before use to avoid thread damage or tap breakage.