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OSG Extension Tap: #8-32 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer - Spiral-Point Extension Taps
OSGSpiral-Point Extension Taps

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

SKU 3G-OTH-313553

Brand
OSG
Item
Extension Tap: #8-32 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer
Category
Spiral-Point Extension Taps
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Technical Specifications

OSG
Manufacturer Part Number
1294300
Type
H3 / 2B-3B, Plug Chamfer, High Speed Steel
Flute
2
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is an OSG extension tap used for?

An OSG extension tap is used to cut internal threads in hard-to-reach or deep-hole applications. The extended shank allows threading in recessed areas, while the spiral-point design pushes chips forward for efficient chip evacuation in through-hole threading.

What are the specifications of the OSG #8-32 UNC extension tap?

This OSG extension tap is #8-32 UNC thread size, with H3 / 2B-3B tolerance, 2 flutes, plug chamfer, and made of high-speed steel. The manufacturer part number is 1294300. It is designed for through-hole threading in steel and non-ferrous materials.

Where to buy OSG extension taps worldwide?

3G Electric supplies OSG extension taps worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the OSG #8-32 UNC extension tap (MPN 1294300).

How to select the correct OSG extension tap for a job?

Select an OSG extension tap based on thread size (e.g., #8-32 UNC), material (high-speed steel for general use), chamfer type (plug for through-holes), and flute count (2 flutes for chip clearance). Match the tap tolerance (H3) to the required thread class (2B or 3B).

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. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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