OSG Extension Tap: 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer

An OSG extension tap is used to cut internal threads in deep or hard-to-reach holes. The extended shank allows threading in locations where a standard tap cannot reach, such as in engine blocks or deep bores. This 3/8"-16 UNC plug chamfer tap is designed for through-hole threading in metalworking applications.

The OSG 1295301 is a 3/8"-16 UNC spiral-point extension tap with a plug chamfer. It has 3 flutes, a H3 / 2B-3B tolerance class, and is made from black oxide high-speed steel. This design provides good wear resistance and chip evacuation for threading in steel and other materials.

3G Electric supplies OSG extension taps like the 1295301 to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial sourcing partner, we provide genuine OSG cutting tools and can quote for your specific thread size and quantity requirements.

Select an OSG extension tap based on thread size, pitch, and hole depth. For UNC 3/8"-16 threads, ensure the tap has a plug chamfer for through holes and a H3 tolerance for class 2B fit. The extended shank length must exceed the hole depth. Use proper cutting fluid and rigid tapping equipment for best results.