OSG Extension Tap: #6-40 UNF, H2 / 2B-3B, 2 Flute

The OSG Extension Tap #6-40 UNF is used for threading blind holes in multiple materials, including steel, stainless steel, and aluminum. Its spiral-flute design evacuates chips upward, making it ideal for deep-hole tapping. The modified bottoming chamfer allows threading close to the hole bottom, common in automotive and aerospace manufacturing.

The OSG Extension Tap has a #6-40 UNF thread size, H2 / 2B-3B tolerance, 2-flute design, and a modified bottoming chamfer. The manufacturer part number is 1652500708. It is a spiral-flute extension tap designed for multiple materials, enabling efficient chip evacuation in deep-hole applications.

You can source the OSG Extension Tap #6-40 UNF worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply genuine OSG taps for manufacturing and maintenance operations.

To select the correct OSG Extension Tap, match the thread size (e.g., #6-40 UNF) and tolerance (H2 / 2B-3B) to your hole requirements. Consider material type and hole depth—spiral-flute taps suit blind holes. Use a modified bottoming chamfer for threads near the hole bottom. Always verify the tap's flute count and coating for your application.