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OSG Extension Tap: 3/4"-10 UNC, H3 / 2B-3B, 4 Flute, Plug Chamfer - Pulley Taps
OSGPulley Taps

OSG Extension Tap: 3/4"-10 UNC, H3 / 2B-3B, 4 Flute, Plug Chamfer

The OSG Extension Tap (3/4"-10 UNC, MPN 1293801) is a pulley tap with a plug chamfer, 4 flutes, and black oxide high-speed steel construction. It is specified as H3 / 2B-3B, designed for threading applications…

SKU 3G-OTH-308199

Brand
OSG
Item
Extension Tap: 3/4"-10 UNC, H3 / 2B-3B, 4 Flute, Plug Chamfer
Category
Pulley Taps
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Technical Specifications

OSG
Manufacturer Part Number
1293801
Type
H3 / 2B-3B, Plug Chamfer, Black Oxide High Speed Steel
Flute
4
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Extension Tap (3/4"-10 UNC, MPN 1293801) is a pulley tap with a plug chamfer, 4 flutes, and black oxide high-speed steel construction. It is specified as H3 / 2B-3B, designed for threading applications requiring extended reach.

Frequently Asked Questions

What is the OSG Extension Tap 3/4"-10 UNC used for?

The OSG Extension Tap is used for threading blind or deep holes in metalworking applications. Its extended length reaches recessed areas where standard taps cannot access, making it ideal for automotive, aerospace, and general manufacturing maintenance and repair operations.

What are the specifications of the OSG Extension Tap 1293801?

This OSG Extension Tap has a 3/4"-10 UNC thread size, H3 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It is made from black oxide high-speed steel (HSS) for durability and chip evacuation. The manufacturer part number is 1293801.

Where to buy the OSG Extension Tap 1293801 worldwide?

You can source the OSG Extension Tap 1293801 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive the correct threading tool for your application.

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

Select the tap based on thread size (e.g., 3/4"-10 UNC), hole depth (extension length needed), material (black oxide HSS for steel), and tolerance class (H3 for 2B-3B fit). Always match the tap chamfer (plug for blind holes) and flute count to your workpiece and machine setup.

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

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