Value Collection JY4846804 Straight Flute Tap 11/16-20 Uns

Product Description

The VALUE COLLECTION JY4846804 is a straight flute bottoming tap designed for cutting 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 an 11/16-20 UNS right-hand thread to a 3B class of fit with an H3 thread limit. The 4-flute straight flute configuration provides strong cutting edges and efficient chip clearance in a wide range of ferrous and non-ferrous materials. Overall length is 4-1/32 inches. It is suited for use in manual tap wrenches or machine tapping applications on drill presses and CNC machining centers.

This tap is used in machine shops, maintenance facilities, and fabrication environments where UNS thread forms are required. The bottoming chamfer — typically 1 to 2 threads of lead — allows threading to within a very short distance of the bottom of a blind hole, making it the final step in a two- or three-tap sequence following a taper or plug tap. Typical applications include repair threading, fixture fabrication, and production machining where the 11/16-20 UNS thread specification is called out. Installation is performed by licensed machinists or skilled tradespeople working to engineering drawings.

Key Features

• Bottoming chamfer for threading blind holes to near-full depth
• 11/16-20 UNS thread form, right-hand direction
• 4 straight flutes for strength and chip clearance
• H3 thread limit for consistent 3B class of fit
• High-speed steel construction for durability across a range of workpiece materials
• Bright/uncoated finish — no coating buildup to affect thread tolerances

Compatibility

Designed as an OEM-style replacement or standard tooling tap for any application requiring an 11/16-20 UNS internal thread with a 3B class of fit.

Installation Notes

This tap should be installed into a properly sized tap wrench or machine tapping chuck rated for the shank diameter. Always ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size for an 11/16-20 UNS thread before use. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Use the bottoming tap as the final step in a progressive tapping sequence — do not use it as the first tap in a blind hole.