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

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

The OSG Extension Tap (#8-32 UNC, MPN 1296700) 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, designed for threading applications…

SKU 3G-OTH-310976

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

OSG
Manufacturer Part Number
1296700
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 1296700) 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, designed for threading applications requiring extended reach.

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. Its spiral-flute design evacuates chips upward, making it ideal for bottoming chamfer applications in metalworking and maintenance. This tap is commonly used in automotive, aerospace, and general manufacturing.

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 with a H3 / 2B-3B tolerance class. It features 3 flutes, a bottoming chamfer, and is made from high-speed steel. The manufacturer part number is 1296700. This spiral-flute extension tap is designed for threading blind holes in confined spaces.

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

You can source the OSG Extension Tap #8-32 UNC (MPN 1296700) worldwide through 3G Electric. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply this OSG tap to customers across industries.

How to select the correct OSG Extension Tap for a job?

To select the correct OSG Extension Tap, match the thread size (e.g., #8-32 UNC) and tolerance class (H3 / 2B-3B) to your workpiece requirements. Choose a bottoming chamfer for blind holes and a spiral-flute design for chip evacuation. Ensure the tap's length reaches the threading depth. Consult OSG's technical data for material compatibility.

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-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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