Value Collection MSC-04488144 Hand Tap 7/8-14 Unf

Product Description

The VALUE COLLECTION MSC-04488144 is a 7/8-14 UNF straight flute hand tap designed for cutting right-hand internal threads in ferrous and non-ferrous materials. Built from high speed steel with a bright uncoated finish, this tap delivers reliable thread-cutting performance in a standard H4 thread limit. The plug chamfer — typically 3 to 5 threads — makes it suitable for through-holes and deeper blind holes where a starting taper is not required. Overall length is 4-11/16 inches with a thread length of 2-7/32 inches. It is intended for hand tapping operations by machinists, maintenance technicians, and tool-and-die professionals.

This tap is used wherever a 7/8-14 UNF internal thread is required in production, repair, or maintenance work. The 3B class of fit meets standard tolerance requirements for general-purpose unified fine thread applications. Four straight flutes provide adequate chip clearance in most materials. Common applications include hydraulic fittings, threaded fastener repair, tooling fixtures, and mechanical assemblies where fine thread pitch is specified. It is suited for low-speed, hand-driven or machine-assisted tapping in a drill press or tapping arm setup.

Key Features

• 7/8-14 UNF right-hand thread profile with plug chamfer for through-holes and deeper blind holes
• High speed steel construction provides hardness and wear resistance for general-purpose tapping
• Bright uncoated finish — no additional surface treatment that could alter thread dimensions
• H4 thread limit and 3B class of fit for standard-tolerance unified fine thread applications
• 4-flute straight flute geometry offers balanced chip clearance across common workpiece materials
• Overall length of 4-11/16 inches with 2-7/32 inches of thread engagement length

Compatibility

Designed as a standard replacement or supplemental tap for any setup requiring a 7/8-14 UNF 3B H4 plug-chamfer hand tap. Compatible with standard tap wrenches and T-handle drivers sized for 7/8-inch taps.

Installation Notes

This tap is installed by machinists and maintenance technicians using a calibrated tap wrench or tapping arm. The workpiece should be secured in a vise or fixture and the correct pilot hole diameter for 7/8-14 UNF must be drilled before tapping. Apply appropriate cutting fluid throughout the tapping operation and back off periodically to break chips. Never force a hand tap — excessive torque will cause breakage.