Import BDNA-22594 Hand Sti Tap 3/8-16 Unc H3 4 Flutes

Product Description

The IMPORT BDNA-22594 is a hand STI tap designed for cutting internal threads in pre-drilled holes to accept Helicoil-style thread inserts. Sized at 3/8-16 UNC with an H3 thread limit, this tap produces threads with the tighter tolerance required for proper insert seating. The 4-flute, plug chamfer geometry provides a gradual lead-in that works well in through holes and moderately deep blind holes. At 3.375 inches overall length, it fits standard tap wrench handles used in most trade and shop environments. The bright, uncoated high-speed steel construction handles a wide range of ferrous and non-ferrous base materials.

This tap is used wherever damaged or stripped threads need to be restored using a threaded insert system. Common applications include equipment repair in HVAC, plumbing, and electrical trades, as well as general maintenance on machinery, housings, and structural components. The 3/8-16 UNC thread size is one of the most common coarse-thread fastener sizes encountered in trade work, making this tap a practical addition to any thread-repair kit. It is matched to the Helicoil reference number 6CPB for insert system compatibility.

Key Features

• 3/8-16 UNC thread size with H3 thread limit for accurate insert-ready tolerances
• 4-flute plug chamfer design suits through holes and moderate-depth blind holes
• High-speed steel construction provides durability across ferrous and non-ferrous materials
• Bright uncoated finish for straightforward visual inspection during use
• 3.375 inches overall length compatible with standard tap wrenches
• Matches Helicoil reference number 6CPB for thread insert system use

Compatibility

Designed for use with Helicoil-style STI thread insert systems requiring a 3/8-16 UNC tap with H3 thread limit; Helicoil reference number 6CPB. Confirm insert manufacturer specifications before use to verify tap sizing requirements.

Installation Notes

This tap is installed by hand using a standard tap wrench and should not be used in a power driver without appropriate torque control. Secure the workpiece before tapping, use a cutting fluid appropriate for the base material, and back the tap out periodically to clear chips. Follow the thread insert manufacturer instructions for proper tap drill sizing before beginning the tap operation.