Value Collection JY4862066 Straight Flute Tap 1-1/8-8 Uns

Product Description

The VALUE COLLECTION JY4862066 is a straight flute bottoming tap designed to cut internal threads in through-holes and blind holes where full thread depth close to the bottom is required. Manufactured from high-speed steel with a bright/uncoated finish, this tap cuts a 1-1/8-8 UNS right-hand thread using 4 straight flutes for efficient chip evacuation in a range of ferrous and non-ferrous materials. With an overall length of 5.4375 inches and a thread length of 2.5625 inches, it is sized for use in manual tapping operations or rigid machine tapping setups.

This tap is suited for maintenance, repair, and production threading applications where a 1-1/8-8 UNS thread form is required. The bottoming chamfer style — typically 1 to 2 thread lead — allows threading to within a few pitches of a blind hole bottom, making it the correct choice when full thread engagement depth is critical. It is commonly used in metalworking, industrial maintenance, and toolroom environments by machinists and tool-and-die professionals.

Key Features

• Bottoming chamfer provides maximum thread depth in blind holes
• High-speed steel construction handles a broad range of workpiece materials
• Bright/uncoated finish suitable for general-purpose threading applications
• 4 straight flutes for clean chip management in through and blind hole applications
• H5 thread limit for controlled fit tolerances in close-tolerance assemblies
• Right-hand thread direction, standard for most UNS threading applications

Compatibility

Designed as an OEM-style threading tool for use in any manual or machine tapping operation requiring a 1-1/8-8 UNS internal thread form.

Installation Notes

Installation is performed by machinists using a tap wrench, tapping head, or rigid machine tapping setup. Always ensure the workpiece is securely fixtured and the tap is aligned axially with the drilled hole before engagement. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Back the tap off periodically to break chips and prevent binding, especially in blind hole applications.