Balax 11865-000 Thread Forming Tap 8-36 Unf Plug Hss

Product Description

The BALAX 11865-000 is a thread forming tap designed for cutting 8-36 UNF internal threads in through-hole applications. Unlike cutting taps, this forming tap displaces material rather than removing chips, producing stronger threads with a burnished surface finish. Built from high-speed steel with a bright uncoated finish, the 11865-000 belongs to the BXP series and carries a plug chamfer with 4 chamfered threads for gradual thread engagement. Overall length is 2.125 inches with a thread length of 0.47 inches and a tapping depth of 0.75 inches. Machinists and tool-and-die professionals use this tap in production and maintenance environments where thread integrity is critical.

This tap is suited for through-hole threading operations in ferrous and non-ferrous materials where a class 2B thread fit is required. The plug chamfer profile makes it appropriate for through-holes where the tap can be driven through the full thread depth without bottoming out. The 8-36 UNF thread form is commonly encountered in precision fastener applications, instrument hardware, and small-diameter mechanical assemblies in both industrial and trade settings.

Key Features

• Thread forming action displaces material for stronger, chip-free threads
• High-speed steel construction provides durability across a range of materials
• Plug chamfer with 4 chamfered threads for controlled thread engagement
• Class 2B fit with H5 thread limit for consistent tolerance control
• Right-hand thread direction, through-hole application
• Single oil groove for lubrication during forming

Compatibility

Designed as an OEM-style replacement or direct-use forming tap for 8-36 UNF through-hole threading operations in standard tap holders and tapping machines accepting a 0.168-inch shank diameter with a 0.131-inch square drive.

Installation Notes

Thread forming taps should be installed by qualified machinists or tool operators familiar with UNF tap specifications and appropriate cutting fluids for the workpiece material. Always verify spindle speed and feed rate are appropriate for the tap diameter and material before operation. Secure the workpiece and ensure the tap is properly aligned to avoid galling or tap breakage. Thread forming taps require a slightly larger pilot hole than cutting taps - consult the BALAX recommended drill chart for the correct hole size for 8-36 UNF forming applications.