OSG Extension Tap: M8x1.25 Metric, D5 / 4H-6H, 3 Flute, Plug Chamfer

An OSG extension tap is used to cut internal threads in hard-to-reach or deep-hole applications. The extended shank allows threading in recessed areas, such as engine blocks or hydraulic manifolds, where standard taps cannot reach. It is common in automotive, aerospace, and general machining.

This OSG extension tap has a metric M8x1.25 thread, D5 / 4H-6H tolerance, 3 flutes, plug chamfer, and black oxide high-speed steel construction. The manufacturer part number is 1111800901. It is designed for through-hole threading with a spiral-point geometry that pushes chips ahead.

3G Electric supplies OSG extension taps worldwide, handling full logistics and customs clearance. As a global industrial sourcing partner, we provide genuine OSG tooling to any destination. Contact us for pricing and lead time on this M8x1.25 tap or other OSG thread-cutting tools.

Select an OSG extension tap based on thread size, material, and hole depth. For steel, use black oxide high-speed steel taps like this M8x1.25 model. Ensure the shank length exceeds the hole depth. Match the chamfer type (plug for through-holes) and flute count to chip evacuation needs.