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OSG #10-32 UNF Spiral-Point Extension Tap - Spiral-Point Extension Taps
OSGSpiral-Point Extension Taps

OSG #10-32 UNF Spiral-Point Extension Tap

The OSG Extension Tap (#10-32 UNF, MPN 1294701) is a spiral-point extension tap with a plug chamfer, made from black oxide high speed steel. It features 2 flutes and is rated H3 / 2B-3B for thread class compatibility.

SKU 3G-OTH-313605

Brand
OSG
Item
#10-32 UNF Spiral-Point Extension Tap
Part Number
1294701
Category
Spiral-Point Extension Taps
Available to Order
Also known as:1294701OSG
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Technical Specifications

OSG
Manufacturer Part Number
1294701
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 (#10-32 UNF, MPN 1294701) is a spiral-point extension tap with a plug chamfer, made from black oxide high speed steel. It features 2 flutes and is rated H3 / 2B-3B for thread class compatibility.

Frequently Asked Questions

What is the OSG #10-32 UNF extension tap used for?

The OSG #10-32 UNF extension tap is used for threading blind or through holes in hard-to-reach areas of metal components. Its extended length and spiral-point design push chips forward, making it ideal for automotive, aerospace, and general manufacturing applications where standard taps cannot reach.

What are the specifications of the OSG 1294701 extension tap?

The OSG 1294701 is a #10-32 UNF spiral-point extension tap with a plug chamfer, 2 flutes, and a H3 / 2B-3B tolerance class. It is made from black oxide high-speed steel for improved wear resistance and chip evacuation. This tap is designed for threading in steel, aluminum, and other common alloys.

Where to buy OSG extension taps in worldwide?

You can source OSG extension taps like the 1294701 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 times on this and other OSG threading tools.

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

To select the correct OSG extension tap, match the thread size (e.g., #10-32 UNF), chamfer type (plug for through holes), and flute count (2 for spiral-point) to your material and hole depth. The H3 / 2B-3B tolerance ensures proper fit. Always verify the tap's reach and coating (black oxide) for your workpiece hardness.

Used in

Common applications for OSG
Aerospace — OSG STI taps for installing helical wire thread inserts in aluminum components
Automotive — OSG spiral-point taps for through-hole threading in engine blocks and transmission cases
General machining — OSG spiral-flute taps for blind-hole threading in steel and stainless steel parts
Heavy equipment repair — OSG thread-forming taps for creating threads in ductile iron and steel castings
Precision manufacturing — OSG solid carbide chucking reamers for finishing holes in hydraulic manifolds
Die and mold — OSG coolant-through solid carbide drills for deep-hole drilling in tool steels
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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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High-speed steel spiral-point extension tap for threading blind or deep holes where standard taps cannot reach. #4-40 UNC thread size, H2 tolerance for 2B-3B class fit, plug chamfer, and 2 flutes. Spiral-point design pushes chips forward for efficient chip evacuation in through-hole applications
OSG
High-speed steel spiral-point extension tap for threading blind or deep holes where standard taps cannot reach. #4-40 UNC thread size, H2 tolerance for 2B-3B class fit, plug chamfer, and 2 flutes. Spiral-point design pushes chips forward for efficient chip evacuation in through-hole applications

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