Value Collection MSC-04470209 1/4-20 Unc Tap Hss

Product Description

The VALUE COLLECTION MSC-04470209 is a straight flute tap designed for cutting 1/4-20 UNC internal threads in a wide range of materials. Built from high-speed steel with a bright, uncoated finish, this tap delivers reliable thread formation in production and maintenance environments. The plug chamfer design — with 7 to 10 chamfered leading threads — provides a balanced starting action suitable for through holes and deeper blind holes where threading can begin with gradual engagement. Four flutes provide chip clearance and stable cutting geometry across common ferrous and non-ferrous workpiece materials.

This tap is suited for general machining, maintenance, repair, and fabrication work requiring 1/4-20 UNC threads. It is a standard choice for job shops, tool rooms, and field repair scenarios where a plug-style tap handles the majority of through-hole and mid-depth blind-hole threading tasks. The H3 thread limit supports standard tolerance fits under 3B class-of-fit specifications, making it appropriate for assemblies requiring reliable thread engagement with standard 1/4-20 fasteners.

Key Features

• 1/4-20 UNC thread form with right-hand thread direction
• Plug chamfer for versatile through-hole and blind-hole threading
• 4-flute straight design provides stable cutting and chip clearance
• H3 thread limit — compatible with 3B class-of-fit tolerance requirements
• High-speed steel construction for use across a broad range of workpiece materials
• Bright, uncoated finish — ready to use as-is or with cutting fluid

Compatibility

Designed as a standard OEM-style replacement or new-install tap for any application requiring 1/4-20 UNC right-hand internal threads at 3B class of fit.

Installation Notes

Threading operations should be performed by machinists or qualified tradespeople using a tap wrench, tapping head, or CNC tapping cycle appropriate to the material and depth. Always use a suitable cutting fluid or tapping compound to extend tool life and improve thread quality. Ensure the workpiece is securely fixtured and that the tap is aligned perpendicular to the entry surface before engagement. Back out periodically to clear chips, particularly in blind-hole applications.