Accupro 14185-00T Thread Forming Tap 1/2-20 Unf Plug Tin

Product Description

The ACCUPRO 14185-00T is a thread forming tap designed for producing strong, work-hardened internal threads without cutting chips. Made from powdered metal high-speed steel with a titanium nitride (TiN) coating, this tap displaces material rather than cutting it, resulting in threads with improved surface finish and fatigue resistance. It is configured in a plug chamfer style with 4 chamfered threads, a class 3B fit, and an H5 thread limit. The 1/2-20 UNF thread form and right-hand direction make it a standard choice for precision fastener applications in ductile materials. Licensed machinists and toolroom professionals are the primary users.

This tap is suited for through-hole threading operations in ductile metals such as aluminum, mild steel, copper, and similar alloys where chip formation must be avoided. The plug chamfer style makes it appropriate for both through-hole starting and general production threading where the hole runs completely through the workpiece. The single oil groove aids lubrication during the forming process, making it well-suited for CNC machining centers, drill presses, and manual tapping operations where cutting fluid can be applied.

Key Features

• Thread forming design displaces material instead of cutting, eliminating chip buildup in the hole
• Powdered metal high-speed steel construction provides uniform grain structure and extended tool life
• TiN coating reduces friction and increases surface hardness for longer run lengths
• Plug chamfer with 4 chamfered threads allows easy starting in through-hole applications
• H5 thread limit and Class 3B fit support close-tolerance fastener assemblies
• Single oil groove promotes consistent lubrication during forming

Compatibility

Designed for through-hole threading in ductile workpiece materials using 1/2-20 UNF right-hand thread form. Suitable for use in CNC machining centers and manual tapping setups where thread forming taps are specified over cutting taps.

Installation Notes

Thread forming taps require a specific tap drill size larger than that used for cutting taps - consult a thread forming drill chart for the correct hole diameter before use. Apply a suitable tapping fluid or cutting oil continuously during the forming process to prevent galling and extend tap life. Secure the workpiece firmly and ensure the tap enters the hole square to avoid misalignment and tap breakage. Always follow applicable shop safety procedures and machine-specific operating guidelines when performing tapping operations.