OSG Extension Tap: M18x2 Metric, D7 / 4H-6H, 4 Flute

An OSG extension tap is used to cut internal threads in hard-to-reach or deep-hole applications across multiple materials. Its extended reach and spiral-flute design efficiently evacuate chips, making it ideal for machining, automotive, and general manufacturing where standard taps cannot access the workpiece.

This OSG extension tap has a metric M18x2 thread size, a D7 / 4H-6H tolerance class, 4 flutes, and a modified bottoming chamfer. The spiral-flute design suits multiple materials. The manufacturer part number is 1652008208. These specs ensure precise thread cutting in deep or obstructed locations.

3G Electric supplies OSG extension taps worldwide, handling full logistics and customs clearance for global delivery. As a sourcing specialist across 14 industrial departments, we provide genuine OSG cutting tools like the M18x2 spiral-flute tap. Contact us for availability and lead time to your location.

Select an OSG extension tap by matching thread size (e.g., M18x2), pitch, and tolerance class (D7 / 4H-6H) to your application. Consider the chamfer type—modified bottoming for blind holes—and flute design for chip evacuation. Verify reach length and material compatibility. 3G Electric can help source the right tap.