Value Collection MSC-04475158 Tap Set 9/16-12 Unc 4 Flute Hss

Product Description

The VALUE COLLECTION MSC-04475158 is a 3-piece tap set designed for cutting 9/16-12 UNC internal threads in metal workpieces. Each tap is machined from high-speed steel (HSS) with a bright, uncoated finish and features 4 flutes for efficient chip evacuation during threading operations. The overall length of each tap is 3-19/32 inches, with a thread length of 1-21/32 inches. Right-hand thread direction and an H3 thread limit make this set suitable for standard UNC threading work across a range of ferrous and non-ferrous materials. Machinists, maintenance technicians, and toolroom professionals reach for this set when cutting or restoring 9/16-12 threads by hand or in a drill press setup.

This tap set is suited for general-purpose threading in job shop, manufacturing, and maintenance-repair-operations (MRO) environments. The 9/16-12 UNC thread form is a common coarse-thread specification found in structural fastener applications, machinery frames, and heavy equipment. The 3-piece set typically includes taper, plug, and bottoming taps, allowing the user to start, advance, and finish threads in both through-holes and blind holes. The H3 tolerance class is appropriate for standard-fit threading where moderate tolerances are acceptable.

Key Features

• High-speed steel (HSS) construction for durability across a wide range of work materials
• 4-flute design promotes chip evacuation and thread quality during cutting
• 9/16-12 UNC thread specification with H3 thread limit for standard-fit applications
• Right-hand thread direction for conventional threading operations
• Bright, uncoated finish suitable for use with standard cutting fluids
• Overall length of 3-19/32 inches with a 1-21/32 inch thread length
• 3-piece set covers taper, plug, and bottoming tap functions

Compatibility

Designed as a general-purpose replacement or addition to standard UNC tap sets for hand tapping or machine tapping of 9/16-12 coarse-thread holes in ferrous and non-ferrous metals.

Installation Notes

Threading operations should be performed by a qualified machinist or maintenance technician familiar with proper tap alignment, feed rate, and cutting fluid selection. Always ensure the workpiece is securely clamped before beginning the threading operation. Apply an appropriate cutting fluid to extend tap life and improve thread finish. Back the tap off periodically to break chips and prevent tap breakage, especially in blind holes.