Cleveland C54598 Hand Tap 3/8-24 Unf Plug 3-flute Hss

Product Description

The CLEVELAND C54598 is a straight-flute hand tap designed for cutting internal threads in a 3/8-24 UNF thread form. Built from high speed steel with a bright uncoated finish, this plug chamfer tap suits both blind hole and through-hole threading operations. It carries a Class 3B fit with an H3 thread limit, making it appropriate for close-tolerance work where thread accuracy matters. Overall length is 2.938 inches with a thread length of 0.75 inches (31.75 mm). The 3-flute geometry provides a balance of chip clearance and thread support across a range of workpiece materials.

This tap is suited for manual tapping operations on the benchtop or in a drill press setup where a tapping handle or wrench is used. The plug chamfer style — typically 3 to 5 threads of lead — makes it a general-purpose choice for starting a tap in either a blind or through hole. Common installation scenarios include job shop work, maintenance and repair operations, and production runs where a hand tap is the preferred method. The 3B fit class targets standard fastener thread tolerances used across most mechanical assemblies.

Key Features

• 3/8-24 UNF thread form with plug chamfer for general-purpose starting in blind or through holes
• High speed steel construction for durability across a range of common workpiece materials
• Bright uncoated finish — no coating buildup to affect thread tolerance
• Class 3B fit with H3 thread limit for close-tolerance thread accuracy
• 3-flute straight flute design balances chip clearance with thread support
• Right-hand thread direction, compatible with standard tapping handles and wrenches

Compatibility

Designed for use on alloy steel, aluminum, carbon steel, and free-machining stainless steel workpieces. Suitable for blind hole and through-hole threading applications using standard tapping handles or wrench-driven tap holders.

Installation Notes

Hand taps should be installed using a properly sized tapping handle or T-handle wrench to maintain alignment and prevent tap breakage. Secure the workpiece firmly and apply cutting fluid appropriate for the workpiece material before beginning the threading operation. Reverse the tap periodically to break chips, especially in blind hole applications. Inspect the tap for wear or chipping before each use — a damaged tap can produce out-of-tolerance threads or break off in the hole.