OSG Extension Tap: #8-32 UNC, H3 / 2B-3B, 3 Flute

The OSG #8-32 UNC extension tap is designed for threading blind holes in steel and stainless steel. Its spiral-flute design evacuates chips upward, preventing clogging, while the modified bottoming chamfer allows threading close to the hole bottom. It is commonly used in automotive, aerospace, and general manufacturing applications.

The OSG extension tap MPN 1766901 has a #8-32 UNC thread size, H3 / 2B-3B tolerance class, 3-flute design, and a modified bottoming chamfer. It is a spiral-flute extension tap optimized for steel and stainless steel. The H3 ground thread limit ensures precise fit for 2B-3B class threads.

3G Electric supplies OSG extension taps like the #8-32 UNC MPN 1766901 worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time; we source and deliver OSG tooling to any international destination.

Select an OSG extension tap based on thread size, tolerance class, and material. For steel and stainless steel, use a spiral-flute tap with a modified bottoming chamfer, like the #8-32 UNC H3 / 2B-3B. Ensure the tap's flute length matches hole depth. Always match the tap's coating and geometry to the workpiece hardness for optimal thread quality.