Value Collection MSC-04559126 Spiral Point Tap 1-12 Unf

Product Description

The VALUE COLLECTION MSC-04559126 is a spiral point tap designed for cutting right-hand internal threads in through-hole applications. It is ground to a 1-12 UNF thread form with a plug chamfer, which distributes the cutting load across several leading threads and makes it well suited for threading operations where the tap can exit the opposite side of the workpiece. Manufactured from high speed steel with a bright uncoated finish, this tap holds up under typical machine tapping speeds and is compatible with a wide range of cutting fluids. It carries an H4 thread limit and a 3B class of fit, placing it in the tighter end of standard tolerance for precision thread engagement. The threaded portion measures 2.5 inches in length.

This tap is used in general machining, toolroom, and maintenance environments where 1-12 UNF through-hole threads are required. The plug chamfer style is the most common choice for production tapping in materials such as mild steel, aluminum, and plastics where chip evacuation through the hole is practical. It is sized for use in manual tap handles, tapping heads, and CNC machining centers with rigid or floating tap holders.

Key Features

• 1-12 UNF right-hand thread form for standard unified fine-thread applications
• Plug chamfer distributes cutting load and aids chip pushing in through-hole work
• H4 thread limit with 3B class of fit for precise, consistent thread tolerance
• High speed steel construction provides durability across a range of workpiece materials
• Bright uncoated finish compatible with most cutting oils and water-soluble coolants
• 2.5-inch thread length accommodates deeper through-hole threading requirements

Compatibility

Designed as a standard UNF spiral point tap for use in through-hole tapping applications requiring a 1-12 thread form with a 3B class of fit.

Installation Notes

This tap is installed by a machinist or maintenance technician using a standard tap wrench, tapping head, or rigid CNC holder. Secure the workpiece firmly and ensure the tap is started square to the hole to prevent thread deviation or tap breakage. Apply an appropriate cutting fluid for the workpiece material and clear chips regularly when tapping manually. Inspect the tap for wear or damage before each use, as a dull or chipped tap significantly increases the risk of breakage.