OSG 1/4"-28 UNF Spiral-Flute Extension Tap for Steel & Stainless Steel

This OSG extension tap is designed for threading blind holes in steel and stainless steel. Its spiral-flute design evacuates chips upward, making it ideal for deep-hole tapping. The bottoming chamfer allows threading close to the hole bottom, common in automotive and general manufacturing applications.

The OSG Extension Tap has a 1/4"-28 UNF thread size, H3 / 2B-3B tolerance, and a bottoming chamfer with 3 flutes. It is a spiral-flute tap designed for steel and stainless steel. The manufacturer part number is 0144201, and it is classified as a spiral-flute extension tap.

3G Electric supplies the OSG Extension Tap MPN 0144201 worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this precision threading tool globally.

Select an OSG extension tap based on thread size, pitch, and material. For steel and stainless steel, use a spiral-flute design with a bottoming chamfer for blind holes. The H3 / 2B-3B tolerance ensures proper fit. Always match the tap to the hole depth and thread class required by your application.