Value Collection JY4740205 1/4-20 Unc Straight Flute Tap

Product Description

The VALUE COLLECTION JY4740205 is a straight flute plug tap designed for cutting right-hand internal threads in through-holes and blind holes where chip clearance is not a limiting factor. Manufactured from high-speed steel with a bright uncoated finish, this tap cuts 1/4-20 UNC threads and carries an H11 thread limit designation, making it slightly oversize by 0.0050 inches to account for predictable spring-back in a variety of workpiece materials. With four flutes and a plug chamfer style, it provides a balance between cutting ease and thread engagement suited to general-purpose machine shop and maintenance applications.

This tap is used in production and maintenance settings where 1/4-20 UNC threaded holes are required in steel, aluminum, cast iron, and similar materials. The plug chamfer — typically 3 to 5 threads of lead — makes it appropriate as a starting tap or as a single-tap solution in through-hole applications. Machinists, maintenance technicians, and trade professionals working in HVAC equipment fabrication, electrical enclosure assembly, plumbing fixture work, and general mechanical repair will find this tap suitable for hand tapping or low-speed machine tapping operations.

Key Features

• 1/4-20 UNC thread form with right-hand thread direction
• 4-flute straight flute design for general-purpose tapping
• Plug chamfer provides easy thread starting in through-holes
• High-speed steel construction for durability across common workpiece materials
• H11 thread limit with 0.0050-inch oversize for consistent thread fit
• Bright uncoated finish — compatible with standard cutting fluids

Compatibility

Designed as a general-purpose replacement or stock tap for any application requiring 1/4-20 UNC right-hand internal threads with an H11 thread limit.

Installation Notes

This tap should be installed using a properly sized tap wrench or machine tap holder rated for the thread size. Always apply appropriate cutting fluid for the workpiece material and back off periodically to break chips during hand tapping. Ensure the tap is started square to the workpiece to prevent thread misalignment or tap breakage. Follow applicable shop safety practices and machine guarding requirements when power tapping.