Value Collection JY4837803 Straight Flute Tap 8-80 Uns Hss

Product Description

The VALUE COLLECTION JY4837803 is a straight flute tap designed for cutting internal threads in through-holes and shallow blind holes where chip evacuation is manageable. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap cuts 8-80 UNS threads with a plug chamfer that provides a gradual thread lead-in for controlled starting. The 4-flute geometry offers good surface finish and rigidity in standard tapping operations. With an overall length of 2.125 inches, it suits both hand tapping and machine tapping setups. Machinists, tool-and-die makers, and maintenance technicians install this type of tap in ferrous and non-ferrous materials across precision machining and repair applications.

This tap is suited for threading 8-80 UNS holes in general metalworking, instrument manufacturing, and precision assembly work. The 8-80 UNS thread form is commonly found in fine-pitch fastener applications where a unified coarse or fine series is not available. The plug chamfer, typically 3 to 5 threads of lead, makes this tap appropriate for both hand-driven tap wrenches and machine tapping under controlled feed rates. A 3B class of fit produces standard internal thread tolerances suitable for most commercial and precision fastener applications.

Key Features

• 8-80 UNS thread form for fine-pitch unified special series applications
• Plug chamfer (3-5 thread lead-in) for controlled thread starting in through-holes and shallow blind holes
• 4-flute straight geometry for rigidity and clean thread finish
• High-speed steel construction for durability in general-purpose tapping
• H3 thread limit for 3B class of fit — standard internal thread tolerance range
• Bright, uncoated finish — suitable for use with cutting oil or tapping fluid

Compatibility

Designed as an OEM-style replacement or standard tooling selection for any application requiring 8-80 UNS internal threads at a 3B class of fit.

Installation Notes

This tap should be installed and operated by a qualified machinist or maintenance technician familiar with threading operations. Always secure the workpiece and use a properly sized tap wrench or tapping fixture to maintain axial alignment with the drilled hole. Apply appropriate cutting fluid or tapping oil before and during the tapping process to reduce heat and extend tool life. Back the tap out periodically to break chips and clear flutes, especially in deeper holes.