Value Collection JY4884037 Hand Tap 2-1/2-8 Uns

Product Description

The VALUE COLLECTION JY4884037 is a straight-flute hand tap designed for cutting 2-1/2-8 UNS internal threads in a wide range of materials. Built from bright, uncoated high speed steel, this bottoming-chamfer tap cuts threads to the very bottom of a blind hole, making it the correct choice for applications where full thread depth at the base of the bore is required. The H6 thread limit designation indicates a tighter tolerance class suitable for standard-fit threading work. Six flutes provide balanced cutting action and adequate chip clearance for controlled, accurate thread formation. Overall length is 8.75 inches, with a thread length of 4 inches.

This tap is suited for manual threading operations performed with a tap wrench or equivalent hand-tapping equipment. It is used in maintenance, repair, and fabrication environments where large-diameter UNS threads are required in ferrous and non-ferrous materials. The 2-1/2-8 UNS thread form is a coarse unified national special thread used in heavy industrial, structural, and mechanical assembly applications. Machinists, millwrights, and maintenance technicians typically reach for this size when rethreading or creating new threaded holes in heavy-duty components.

Key Features

• Bottoming chamfer cuts threads to the base of a blind hole
• 2-1/2-8 UNS thread form for heavy industrial applications
• H6 thread limit for controlled fit tolerance
• 6-flute straight-flute design for balanced cutting and chip clearance
• High speed steel construction for durability under manual tapping loads
• Bright uncoated finish - no coating to interfere with dimensional accuracy

Compatibility

Designed as an OEM-style hand tap for use with standard tap wrenches and manual tapping setups requiring 2-1/2-8 UNS thread form.

Installation Notes

A licensed machinist or qualified maintenance technician should perform large-diameter hand tapping operations. Ensure the workpiece is securely fixtured before beginning. Use appropriate cutting fluid for the workpiece material to reduce friction and extend tap life. A bottoming tap should only be used after a taper or plug tap has already started the thread sequence in a blind hole.