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OSG #8-32 UNC Spiral-Flute Extension Tap - Spiral-Flute Extension Taps
OSGSpiral-Flute Extension Taps

OSG #8-32 UNC Spiral-Flute Extension Tap

The OSG Extension Tap (#8-32 UNC, MPN 1296900) is a spiral-flute extension tap with a bottoming chamfer, made from high-speed steel. It features 3 flutes and is rated H3 / 2B-3B for thread class compatibility.

SKU 3G-OTH-310968

Brand
OSG
Item
#8-32 UNC Spiral-Flute Extension Tap
Part Number
1296900
Category
Spiral-Flute Extension Taps
Available to Order
Also known as:1296900OSG
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Technical Specifications

OSG
Manufacturer Part Number
1296900
Type
H3 / 2B-3B, Bottoming Chamfer, High Speed Steel
Flute
3

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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Extension Tap (#8-32 UNC, MPN 1296900) is a spiral-flute extension tap with a bottoming chamfer, made from high-speed steel. It features 3 flutes and is rated H3 / 2B-3B for thread class compatibility.

Frequently Asked Questions

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

The OSG Extension Tap #8-32 UNC is used for threading blind holes in hard-to-reach areas, such as deep bores or recessed surfaces in metalworking. Its spiral-flute design evacuates chips upward, making it ideal for bottoming chamfer applications in automotive, aerospace, and general manufacturing where precise internal threads are required.

What are the specifications of the OSG Extension Tap #8-32 UNC?

The OSG Extension Tap #8-32 UNC has a thread size of #8-32 UNC with an H3 / 2B-3B tolerance class. It features 3 flutes, a bottoming chamfer, and is made from high-speed steel. The manufacturer part number is 1296900, and it is designed for spiral-flute extension tapping applications.

Where to buy the OSG Extension Tap #8-32 UNC worldwide?

You can source the OSG Extension Tap #8-32 UNC worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we provide reliable sourcing and supply for this OSG tapping tool.

How to select the correct OSG Extension Tap for threading?

To select the correct OSG Extension Tap, match the thread size (e.g., #8-32 UNC), chamfer type (bottoming for blind holes), and tolerance class (H3 / 2B-3B) to your application. Consider material hardness and hole depth; high-speed steel taps suit general-purpose threading. For extension taps, ensure reach length accommodates your workpiece geometry.

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-flute 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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