Value Collection JY4840195 Straight Flute Tap 1/4-18 Uns

Product Description

The VALUE COLLECTION JY4840195 is a straight flute tap designed for cutting 1/4-18 UNS internal threads in a range of materials. Built from high-speed steel with a bright, uncoated finish, this tap delivers consistent thread formation in production and maintenance applications. It features a plug chamfer for general-purpose through-hole and blind-hole threading, a 3B class of fit for standard tolerance internal threads, and an H3 thread limit for reliable dimensional control. Overall length is 2.5 inches, making it compatible with standard tap handles and machine tool holders used in machining and fabrication environments.

This tap is suited for use by machinists, maintenance technicians, and tool and die professionals working on light to medium threading operations. The 1/4-18 UNS thread form is common in specialized fastener and pipe-adjacent applications where Unified National Special threads are required. The plug chamfer style makes it appropriate as a starting tap for most through-hole threading jobs and for finishing blind holes where adequate thread depth is achievable.

Key Features

• 1/4-18 UNS thread form for Unified National Special thread applications
• 4-flute straight flute design provides stable cutting action in a wide range of materials
• Plug chamfer for general-purpose through-hole and standard blind-hole threading
• 3B class of fit meets standard tolerance requirements for internal threaded components
• H3 thread limit provides consistent oversize control for reliable fit
• High-speed steel construction offers durability in hand and machine tapping operations

Compatibility

Designed as a standard straight flute tap for use with compatible tap handles, tap wrenches, and CNC or manual machine tool holders sized for 1/4-inch shank taps.

Installation Notes

This tap is installed by machinists and maintenance technicians using a tap handle, T-handle wrench, or machine tool holder appropriate for the shank diameter. Always ensure the workpiece is securely fixtured and the tap is properly aligned with the pilot hole before beginning the threading operation. Use appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Back the tap out periodically during hand tapping to break chips and prevent binding.