Value Collection JY4843231 Straight Flute Tap 7/16-27 Uns

Product Description

The VALUE COLLECTION JY4843231 is a straight flute bottoming tap designed to cut internal threads in pre-drilled holes where threads must extend close to the bottom of a blind hole. Manufactured from high-speed steel with a bright, uncoated finish, this tap produces 7/16-27 UNS right-hand threads to a 3B class of fit with an H3 thread limit. With four straight flutes, it is well suited for threading softer materials and through-hole applications where chip evacuation is managed manually. The overall length is 3-5/32 inches, providing adequate shank length for secure chuck engagement in standard tapping equipment.

This tap is used in machine shops, maintenance facilities, and production environments where UNS thread forms are required. The bottoming chamfer, which features only 1 to 2 threads of taper, is the right choice when threads must be cut to the full depth of a blind hole. It is appropriate for use in manual tapping handles or powered tapping heads operating at controlled speeds and feeds. Typical applications include fabrication work, repair threading, and OEM production where the 7/16-27 UNS thread specification is called out on engineering drawings.

Key Features

• Bottoming chamfer allows threads to be cut to the bottom of blind holes
• 7/16-27 UNS thread form with right-hand thread direction
• 4 straight flutes for stable cutting action in a range of materials
• H3 thread limit for consistent 3B class of fit tolerancing
• High-speed steel construction provides durability in general-purpose tapping
• Bright, uncoated finish suitable for use with standard cutting oils and tapping fluids

Compatibility

Designed as an OEM-style replacement or standard-production tap for applications requiring 7/16-27 UNS internal threads at a 3B class of fit.

Installation Notes

This tap should be installed by a machinist or maintenance technician using a properly sized tap wrench or tapping chuck. Ensure the workpiece is securely fixtured and the pilot hole diameter matches the required tap drill size for a 7/16-27 UNS thread before starting. Apply an appropriate cutting fluid throughout the tapping operation to reduce heat and extend tool life. Reverse the tap periodically when hand tapping to break chips and prevent tap breakage in blind holes.