Cleveland C54117 Hand Tap 3-48 Unc Bottoming Hss

Product Description

The CLEVELAND C54117 is a 3-48 UNC straight-flute hand tap designed for cutting internal threads in both blind holes and through-holes. Built from high speed steel (HSS) with a bright, uncoated finish, it features a bottoming chamfer for threading close to the bottom of a blind hole. The right-hand, 3-flute geometry provides balanced cutting action and adequate chip clearance for the small thread size. At 1.813 inches overall length with a 0.500-inch thread length, this tap is suited to precision threading work in small-fastener applications across machining, fabrication, and maintenance environments.

The C54117 is intended for use in manual tapping operations by machinists, tool-and-die makers, and maintenance technicians. The bottoming chamfer style makes it appropriate as the finishing tap in a tap set sequence where threads must extend to near the base of a blind hole. It is also suitable for through-hole threading when full thread engagement close to a shoulder is required. The H2 thread limit supports standard 2B class-of-fit tolerances common in general industrial and mechanical assembly work.

Key Features

• Bottoming chamfer for threading to the base of blind holes
• 3-flute straight-flute design for balanced cutting in small thread sizes
• High speed steel construction for durability across a range of workpiece materials
• Bright uncoated finish suitable for use with cutting fluids
• H2 thread limit maintains 2B class-of-fit tolerance
• Right-hand thread direction, 3-48 UNC designation

Compatibility

Designed for cutting 3-48 UNC threads to a 2B class-of-fit standard; compatible with workpiece materials including alloy steel, aluminum, carbon steel, and free-machining stainless steel.

Installation Notes

This tap is intended for hand tapping operations using a tap wrench or T-handle holder. Secure the workpiece firmly before tapping and apply an appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. Use a bottoming tap only after a taper or plug tap has established the thread in the hole to avoid excessive torque on the tool. Inspect the tap for wear or chipping before each use, as small-diameter taps are susceptible to breakage if forced into a misaligned or undersized hole.