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OSG Extension Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute - Spiral-Flute Extension Taps for Steel & Stainless Steel
OSGSpiral-Flute Extension Taps for Steel & Stainless Steel

OSG Extension Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute

SKU 3G-OTH-315314

Brand
OSG
Item
Extension Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute
Category
Spiral-Flute Extension Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
0144201
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is the OSG Extension Tap 1/4"-28 UNF used for?

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.

What are the specifications of the OSG Extension Tap MPN 0144201?

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.

Where to buy the OSG Extension Tap 1/4"-28 UNF worldwide?

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.

How to select the correct OSG extension tap for steel?

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.

Used in

Common applications for OSG
Automotive engine block production — OSG micro drill bits for oil gallery and coolant passage drilling in cast iron
Medical device manufacturing — OSG micro drill bits for drilling bone screw pilot holes in stainless steel implants
Aerospace component machining — OSG micro drill bits for fastener holes in titanium alloy structural parts
Mold and die making — OSG micro drill bits for cooling channel drilling in hardened tool steel (HRC 45-50)
Electronics enclosure fabrication — OSG micro drill bits for precision holes in aluminum alloy housings (with appropriate coating selection)
General engineering job shops — OSG micro drill bits for small-diameter hole drilling in mild steel and alloy steel parts

OSG Products

3G Electric supplies OSG spiral-flute extension taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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