Balax 12670-000 Thread Forming Tap 1/4-20 Unc Plug Hss

Product Description

The BALAX 12670-000 is a thread forming tap designed for through-hole threading in a plug chamfer configuration. It produces internal threads by displacing material rather than cutting it, resulting in stronger threads with no chips to clear. Made from high-speed steel with a bright, uncoated finish, this tap is built for use in ductile materials where cold forming is appropriate. It carries a thread limit of H10 and features a right-hand thread direction in the 1/4-20 UNC specification. Overall length is 2.5 inches with a tapping depth of 1.0 inch.

This tap is suited for production and maintenance applications requiring clean, strong 1/4-20 UNC internal threads in through-hole configurations. The plug chamfer provides 4 chamfered threads, making it appropriate for both starting in a hole and completing a thread in most standard through-hole depths. It fits into manual tap handles and machine tapping setups used in machining, fabrication, and mechanical assembly environments.

Key Features

• Thread forming design produces chips-free threads by cold-forming material rather than cutting
• 1/4-20 UNC right-hand thread specification
• Plug chamfer with 4 chamfered threads for easy starting in through-holes
• High-speed steel construction for durability in ductile materials
• H10 thread limit for controlled thread fit
• Single oil groove aids lubrication during forming

Compatibility

Designed as an OEM-style replacement or direct-use thread forming tap for through-hole 1/4-20 UNC applications in standard tapping setups using tap handles or machine tapping equipment.

Installation Notes

Thread forming taps require the correct tap drill size for forming rather than cutting, which differs from standard drill sizes used with cutting taps. Apply a suitable tapping fluid or cutting oil before use to reduce forming load and extend tap life. Use in a rigid setup to maintain axial alignment and prevent tap breakage. Always verify the workpiece material is ductile enough for thread forming before proceeding.