OSG Extension Tap: 5/8"-18 UNF, H5 / 2B-3B, 3 Flute
SKU 3G-OTH-311693
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Frequently Asked Questions
What is the OSG extension tap 5/8"-18 UNF used for?
This OSG extension tap is designed 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 where chip clearance is critical. The modified bottoming chamfer allows threading close to the hole bottom.
What are the specifications of the OSG extension tap MPN 1652504308?
The OSG extension tap has a thread size of 5/8"-18 UNF, with an H5 tolerance for class 2B-3B fit. It features 3 flutes and a modified bottoming chamfer. The manufacturer part number is 1652504308, and it is a spiral-flute tap for multiple materials.
Where to buy OSG extension taps in worldwide?
You can source OSG extension taps 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 on this MPN 1652504308 tap.
How to select the correct OSG extension tap for threading?
Select an OSG extension tap based on thread size, pitch, and material. For 5/8"-18 UNF threads in blind holes, use a spiral-flute tap with modified bottoming chamfer. Ensure the tap's H5 tolerance matches your required thread class (2B-3B). Always match tap coating to workpiece hardness for optimal tool life.
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Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute extension taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















