Balax 13290-000 Thread Forming Tap 5/16-24 Unf Plug Hss

Product Description

The BALAX 13290-000 is a thread forming tap designed for right-hand, through-hole threading in 5/16-24 UNF applications. Unlike cutting taps, thread forming taps displace material rather than cut it, producing stronger threads with no chips to clear. This tap is manufactured from high-speed steel with a bright, uncoated finish and carries a H10 thread limit designation. It belongs to the BXP series and is suited for use in ductile metals where cold-forming is appropriate. Machinists and tool-and-die professionals use this tap in production and maintenance environments where clean, chip-free internal threads are required.

This tap is intended for through-hole threading operations on ductile workpiece materials. The plug chamfer style, with 4 chamfered threads, makes it well suited for starting in a drilled hole and progressing through the full thread depth. With a tapping depth of 1.125 inches and a thread length of 0.88 inches, it handles standard through-hole UNF applications in metalworking, fabrication, and machine assembly contexts.

Key Features

• Thread forming design displaces material for chip-free, stronger internal threads
• 5/16-24 UNF thread size with right-hand thread direction
• Plug chamfer with 4 chamfered threads for reliable hole entry and thread progression
• H10 thread limit for consistent tolerance control in production runs
• High-speed steel construction for durability across a range of ductile metals
• Single oil groove to support lubrication during the forming process
• BXP series designation with bright, uncoated finish

Compatibility

Designed for through-hole threading in ductile materials requiring 5/16-24 UNF right-hand internal threads. Verify workpiece material is suitable for cold-form tapping prior to use.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which differs from standard cut tap drill sizes - consult a forming tap drill chart before drilling. Apply cutting or tapping fluid rated for the workpiece material to ensure proper lubrication through the oil groove. Secure the workpiece fully before tapping and use a calibrated tap handle or machine spindle to maintain axial alignment. Do not use on brittle materials such as cast iron or hardened steel.