Cleveland C54662 Hand Tap 7/16-20 Unf Plug Rh H3 Hss

Product Description

The CLEVELAND C54662 is a straight-flute hand tap designed for cutting 7/16-20 UNF right-hand internal threads in both blind and through-hole applications. Built from bright-finish high speed steel, it runs without coolant and holds an H3 thread limit with a Class 2B fit — making it a reliable choice for production and maintenance threading work. The plug chamfer (3 to 5 threads) eases entry into partially formed holes and suits most general-purpose tapping jobs. Overall length is 3.156 inches with a 0.88-inch thread length. Machinists and tool-and-die professionals reach for this tap when threading ductile and machinable materials on manual lathes, drill presses, or by hand.

The C54662 is suited for threading alloy steel, carbon steel, aluminum, and free-machining stainless steel. The straight-flute geometry handles both blind hole and through-hole threading without chip-evacuation complications in these short-chipping materials. The 0.323-inch shank diameter and 0.242-inch square size are compatible with standard tap wrenches and machine collets sized for this shank class. Series 1002 is a production-grade line intended for consistent performance across repeated use in shop and field maintenance environments.

Key Features

• 7/16-20 UNF thread form, right-hand cut, Class 2B fit
• H3 thread limit for controlled tolerance in moderate-clearance applications
• Plug chamfer for easy starting in through-holes and partially formed blind holes
• 4-flute straight-flute geometry suited to short-chipping materials
• Bright uncoated high speed steel construction — no coating to flake or delaminate
• Rated for blind hole and through-hole threading without coolant-through requirement

Compatibility

Designed for use in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces requiring a 7/16-20 UNF internal thread. Compatible with standard tap wrenches and machine holders accepting a 0.323-inch shank diameter.

Installation Notes

A licensed machinist or qualified maintenance technician should select the correct tap drill size for a 7/16-20 UNF thread before tapping. Secure the workpiece fully before applying torque through the tap wrench or machine spindle. Apply a suitable cutting fluid for the workpiece material to extend tap life, even though this tap does not require coolant-through delivery. Inspect the tap for chipping or wear before each use — a damaged tap can seize in the hole or produce out-of-tolerance threads.