Value Collection JY4849154 Straight Flute Tap 1-16 Uns

Product Description

The VALUE COLLECTION JY4849154 is a straight flute bottoming tap designed for cutting internal threads in through-holes and blind holes where threads must extend close to the bottom. Manufactured from high-speed steel with a bright, uncoated finish, this tap produces 1-16 UNS right-hand threads with a 3B class of fit. The H4 thread limit provides controlled oversize tolerance suitable for threading harder materials or plated applications. With four flutes and a bottoming chamfer, it delivers clean thread form in a wide range of metals. Overall length is 5.125 inches. A licensed machinist or toolroom technician installs this tap in CNC machining centers, manual mills, or drill presses.

This tap is suited for industrial, MRO, and toolroom applications where unified national special thread forms are required. The 1-16 UNS designation is a coarse-pitch unified thread used in specialty mechanical assemblies, large-diameter fastener applications, and custom engineered components. The bottoming chamfer style allows threading to within 1 to 2 thread pitches of a blind hole bottom, making it appropriate for close-tolerance work where full thread depth near the base of the hole is critical.

Key Features

• Bottoming chamfer for threading close to the bottom of blind holes
• 1-16 UNS thread form, right-hand direction
• 4-flute design promotes chip clearance and thread accuracy
• H4 thread limit for controlled oversize tolerance in demanding applications
• High-speed steel construction for durability across a range of workpiece materials
• Bright, uncoated finish — compatible with most standard cutting fluids

Compatibility

Designed as a direct-use tap for applications requiring 1-16 UNS internal threads with a 3B class of fit. Confirm holder and machine spindle compatibility with the tap shank diameter before installation.

Installation Notes

This tap is installed by a machinist or toolroom technician using a tap wrench, tapping head, or CNC rigid tapping cycle. Always secure the workpiece and ensure proper alignment before beginning the threading operation to avoid tap breakage. Apply an appropriate cutting fluid for the workpiece material throughout the tapping process. Power down the machine and clear the spindle before removing or changing taps.