Balax 12545-000 Thread Forming Tap 12-28 Unf Plug Hss

Product Description

The BALAX 12545-000 is a thread forming tap designed for through-hole threading in metals and alloys where a strong, chip-free thread form is required. Built from high-speed steel with a bright uncoated finish, this tap displaces material rather than cutting it, producing threads with improved surface finish and increased thread strength compared to cut taps. It is configured in a plug chamfer style with 4 chamfered threads, an H5 thread limit, and a 12-28 UNF right-hand thread specification. The 2B and 3B class of fit makes it suitable for standard precision fastener applications across machining, maintenance, and fabrication environments.

This tap is used in through-hole threading operations on workpieces where a 12-28 UNF thread form is required. The plug chamfer allows it to start in a pre-drilled hole and progress through the material with moderate alignment guidance. At 2.375 inches overall length with a 0.62-inch thread length and a 0.9375-inch tapping depth, it fits standard tap handles and machine collets used in manual and CNC tapping setups. Machinists, tool and die technicians, and maintenance mechanics working in light manufacturing or industrial repair shops are the primary users of this tap.

Key Features

• 12-28 UNF right-hand thread form for standard unified fine-pitch applications
• Plug chamfer with 4 chamfered threads for guided entry in through-hole operations
• High-speed steel construction for durability across a range of workpiece materials
• H5 thread limit and 2B/3B class of fit for consistent, precise thread sizing
• Thread forming design produces no chips, reducing clogging risk in blind and through holes
• 1 oil groove for lubrication during the forming process

Compatibility

Designed as an OEM-style replacement or direct-use thread forming tap for through-hole applications requiring a 12-28 UNF thread specification in the BXP series.

Installation Notes

Thread forming taps require a correctly sized forming tap drill hole, which differs from standard cut tap drill sizes - consult a thread forming tap drill chart before use. Apply appropriate tapping fluid or cutting oil to the tap and workpiece before and during operation to reduce friction and extend tap life. Secure the workpiece firmly and ensure proper tap alignment to prevent tap breakage. Always follow applicable shop safety procedures and power down any machine spindle before changing or inspecting tooling.