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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

The OSG Extension Tap (#8-32 UNC, MPN 1294401) is a spiral-point extension tap with a plug chamfer, black oxide high-speed steel construction, and H3 / 2B-3B thread tolerance. It features 2 flutes and is designed for…

SKU 3G-OTH-313663

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
1294401
Type
H3 / 2B-3B, Plug Chamfer, Black Oxide High Speed Steel
Flute
2
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Extension Tap (#8-32 UNC, MPN 1294401) is a spiral-point extension tap with a plug chamfer, black oxide high-speed steel construction, and H3 / 2B-3B thread tolerance. It features 2 flutes and is designed for through-hole threading applications.

Frequently Asked Questions

What is the OSG #8-32 UNC Extension Tap used for?

The OSG #8-32 UNC Extension Tap is used for threading blind or through holes in metal parts where standard taps cannot reach. Its extended length and spiral-point design push chips forward, making it ideal for automotive, aerospace, and general machining applications requiring precise internal threads.

What are the specifications of the OSG Extension Tap 1294401?

The OSG Extension Tap 1294401 is a #8-32 UNC spiral-point tap with a plug chamfer and 2 flutes. It is made of black oxide high-speed steel with an H3 / 2B-3B thread tolerance. This design ensures accurate threading in medium-hard materials and is suitable for both 2B and 3B class fits.

Where to buy OSG taps in worldwide?

You can source the OSG Extension Tap 1294401 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine OSG cutting tools for manufacturing and maintenance operations.

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

To select the correct OSG extension tap, match the thread size (#8-32 UNC), chamfer type (plug for blind holes), and material (high-speed steel for general use). Verify the thread tolerance (H3 / 2B-3B) matches your required fit class. Ensure the tap length provides sufficient reach for your workpiece geometry.

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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