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

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

SKU 3G-OTH-313181

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

OSG
Manufacturer Part Number
1765101
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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?

The OSG Extension Tap 1/4"-28 UNF is designed for threading blind or deep holes in steel and stainless steel. Its spiral-point design pushes chips forward, reducing clogging. The H3 / 2B-3B tolerance ensures precise fit for UNF fasteners in industrial manufacturing and maintenance applications.

What are the specifications of the OSG Extension Tap MPN 1765101?

The OSG Extension Tap MPN 1765101 has a 1/4"-28 UNF thread size, H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is a spiral-point extension tap for steel and stainless steel. The H3 ground thread form ensures accurate class 2B or 3B internal threads.

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

3G Electric supplies the OSG Extension Tap 1/4"-28 UNF worldwide. As a global industrial distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this OSG tap.

How to select the correct OSG extension tap for steel?

Select an OSG extension tap based on thread size (1/4"-28 UNF), material (steel or stainless steel), and hole depth. The spiral-point design suits through or blind holes. For tight tolerances, choose H3 / 2B-3B. Always match the tap chamfer (plug) to your application requirements.

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-point 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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