OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer

An OSG extension tap is used to cut internal threads in hard-to-reach or deep-hole applications. The #10-24 UNC size with bottoming chamfer allows threading to the bottom of a blind hole. It is commonly used in machining, automotive, and general manufacturing where standard taps cannot reach.

This OSG extension tap is #10-24 UNC, H3 / 2B-3B class, with 3 flutes, bottoming chamfer, and made of high-speed steel. The H3 / 2B-3B designation indicates a precision-ground thread form suitable for both 2B and 3B tolerance classes. Manufacturer part number is 1297100.

3G Electric supplies OSG extension taps worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial sourcing partner, we provide genuine OSG cutting tools like the #10-24 UNC extension tap (MPN 1297100) to customers across multiple industries.

Select an OSG extension tap based on thread size (e.g., #10-24 UNC), chamfer type (bottoming for blind holes), flute count (3-flute for chip evacuation), and material (high-speed steel for general use). Match the H3 / 2B-3B tolerance to your required thread fit. For deep or offset holes, choose the appropriate extension length.