Cleveland C54738 Hand Tap 1/2-20 Plug 4-flute Hss

Product Description

The CLEVELAND C54738 is a 1/2-20 straight flute hand tap designed for cutting internal threads in metalworking applications. Built from high speed steel with a bright uncoated finish, this tap features a plug chamfer and four flutes to efficiently start and complete thread cutting in both blind holes and through-holes. The right-hand thread direction and Class 3B fit with H3 thread limit make it suitable for precision threading work where tight tolerances are required. Overall length is 3.375 inches with a thread length of 0.94 inches. Licensed machinists and tool and die professionals commonly use this tap in production and maintenance environments.

This tap is rated for threading into a range of common metals including alloy steel, aluminum, carbon steel, and free-machining stainless steel. The plug chamfer style makes it versatile enough for both blind hole and through-hole threading operations. It follows the UNF thread standard at 20 threads per inch, making it a standard choice for fine-thread fastener applications in automotive, aerospace, and general machining work. The 0.367 inch shank diameter fits standard tap wrenches and machine tap holders sized for this range.

Key Features

• 1/2-20 UNF right-hand thread, Class 3B fit with H3 thread limit for precise tolerance control
• High speed steel construction for durability across ferrous and non-ferrous metals
• Plug chamfer suitable for both blind hole and through-hole threading
• Four straight flutes for efficient chip formation in short-chipping materials
• Bright uncoated finish compatible with a wide range of cutting fluids
• No coolant-through design — standard hand tap for manual and low-speed machine use

Compatibility

Designed for use in alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces. Compatible with standard tap wrenches and machine holders accepting a 0.367 inch shank diameter. Part of the Cleveland Series 1002 tap line.

Installation Notes

A licensed machinist or toolroom professional should select the correct tap drill size before threading to achieve the specified Class 3B fit. Secure the workpiece fully before tapping and apply appropriate cutting fluid for the material being threaded. For hand tapping, use a calibrated tap wrench and back off periodically to break chips. Do not force the tap if resistance increases — back out and clear chips to avoid breakage.