Value Collection JY4840336 Straight Flute Tap 1/4-32 Unef

Product Description

The VALUE COLLECTION JY4840336 is a straight flute bottoming tap designed to cut internal threads in pre-drilled holes where full thread engagement is needed close to the bottom of a blind hole. Ground to a 1/4-32 UNEF thread form with a right-hand thread direction, this tap features 4 straight flutes that evacuate chips efficiently in short-chipping materials. Manufactured from high-speed steel with a bright uncoated finish, it measures 2.5 inches in overall length and carries an H3 thread limit for consistent tolerance control. Machinists and tool-and-die technicians use this tap in both manual and CNC tapping operations.

This bottoming tap is suited for threading operations in ferrous and non-ferrous metals, plastics, and similar machinable materials where a shallow chamfer lead is required to maximize threaded depth in blind holes. The 1/4-32 UNEF designation makes it appropriate for fine-thread applications in thin-walled parts, instrument components, and precision assemblies where a finer pitch than UNF is specified. It is sold as a single unit and is a standard bench or machine shop consumable for maintenance, repair, and production threading work.

Key Features

• 1/4-32 UNEF right-hand thread form for fine-pitch precision threading
• Bottoming chamfer allows threading to within 1-2 threads of a blind hole bottom
• 4 straight flutes for chip clearance in short-chipping materials
• H3 thread limit for controlled tolerance fit in mating fasteners
• High-speed steel construction provides wear resistance in general-purpose tapping
• Bright uncoated finish suitable for use with standard cutting fluids

Compatibility

Designed as a standard replacement or supplemental bottoming tap for 1/4-32 UNEF threading applications in general machining, maintenance, and production environments.

Installation Notes

Tapping operations should be performed by a qualified machinist using properly sized tap wrenches or a CNC tapping head set to the correct feed rate for the thread pitch. Always apply cutting fluid appropriate for the workpiece material to extend tap life and improve thread finish. Ensure the tap is started straight to avoid cross-threading or breakage, particularly in blind holes. Power down all equipment before changing or inspecting tooling.