Value Collection JY4848099 Hand Tap 7/8-16 Uns Hss

Product Description

The VALUE COLLECTION JY4848099 is a 7/8-16 straight flute hand tap designed for cutting internal threads in ferrous and non-ferrous materials. Built from high speed steel with a bright uncoated finish, it delivers consistent thread form in low- to moderate-volume tapping operations. The plug chamfer — 3 to 5 threads of lead — makes this tap suitable for through-holes and deeper blind holes where a starting chamfer is not required. With 4 flutes and an H4 thread limit, it holds tight tolerances for 3B class-of-fit threads. Overall length is 4-11/16 inches. Machinists and tool-and-die professionals use this tap in manual tapping handles or low-speed drill press setups.

This tap is sized for 7/8-16 Unified National Special threads, a coarser-pitch alternative to standard UNC or UNF configurations at the 7/8 inch diameter. It is suited for repair work, prototype fabrication, and low-production threading in machine shops, maintenance environments, and industrial assembly. Right-hand thread direction is standard. The bright finish makes it a cost-effective choice where cutting fluid is applied manually and extended coating life is not a priority.

Key Features

• 7/8-16 UNS thread form with plug chamfer for through-hole and deeper blind-hole tapping
• High speed steel construction for use across a broad range of workpiece materials
• H4 thread limit holds 3B class-of-fit tolerances for precision thread engagement
• 4-flute straight flute geometry provides consistent chip formation in hand tapping operations
• Bright uncoated finish compatible with standard cutting oils and tapping fluids
• 4-11/16 inch overall length provides clearance in standard tap wrenches and T-handles

Compatibility

Designed for use in standard manual tap wrenches and T-handle drivers sized for 7/8-16 thread applications. Fits workpieces requiring UNS 3B class-of-fit internal threads at 7/8 inch diameter.

Installation Notes

This tap is intended for use by machinists and maintenance professionals familiar with manual threading operations. Secure the workpiece firmly before tapping and apply a suitable cutting fluid throughout the operation to reduce heat and extend tool life. Back the tap off periodically to break chips and prevent binding. Never force a tap against resistance — back out and clear chips before continuing.