Cleveland C54893 Tap Set 7/8-14 Unf 4 Flute Hss 3 Pc

Product Description

The CLEVELAND C54893 is a 3-piece tap set designed for cutting 7/8-14 UNF internal threads in metalworking applications. The set includes bottoming, plug, and taper chamfer taps, giving machinists and tool-and-die technicians a complete progression for threading holes from initial entry through to full thread depth. All three taps are ground from high speed steel (HSS) with a bright finish and feature 4 flutes with a right-hand thread direction. The set is built to the H4 thread limit and the UNF Series 1004 standard, with an overall length of 4.688 inches and a thread length of 2.22 inches.

This tap set is suited for precision threading in ferrous and non-ferrous metals where a 7/8-14 UNF thread form is required. The three-chamfer progression is the standard approach for production and maintenance work where through-holes and blind holes both need to be threaded cleanly. Typical use cases include fabrication shops, maintenance and repair operations, and machine shops working on hydraulic fittings, fastener repairs, and mechanical assemblies that rely on UNF fine-thread engagement.

Key Features

• 3-piece set includes bottoming, plug, and taper chamfer taps for complete thread progression
• 7/8-14 UNF thread form, right-hand direction, H4 thread limit
• 4-flute geometry for efficient chip evacuation and thread form accuracy
• High speed steel construction for durability across a range of metalworking materials
• Bright finish with 4.688-inch overall length and 2.22-inch thread length
• Conforms to Series 1004 UNF standard

Compatibility

Designed for use in any application requiring a 7/8-14 UNF internal thread, compatible with standard tap handles and machine tap adapters sized for the corresponding shank diameter.

Installation Notes

Tap installation should be performed by a qualified machinist or maintenance technician. Secure the workpiece fully before tapping, and use an appropriate cutting fluid for the material being threaded to extend tap life and improve finish quality. Always start with the taper tap to align the thread, progress to the plug, and finish with the bottoming tap when threading to the bottom of a blind hole. Inspect taps for wear or chipping before each use and replace any tap showing visible damage to avoid thread damage or tap breakage.