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3G Electric
OSG 7/16"-14 UNC Spiral-Point Extension Tap - Spiral-Point Extension Taps
OSGSpiral-Point Extension Taps

OSG 7/16"-14 UNC Spiral-Point Extension Tap

The OSG Extension Tap (MPN 1295401) is a 7/16"-14 UNC spiral-point extension tap with a plug chamfer, black oxide high-speed steel construction, and three flutes. It is specified as H3 / 2B-3B, designed for threading…

SKU 3G-OTH-313642

Brand
OSG
Item
7/16"-14 UNC Spiral-Point Extension Tap
Part Number
1295401
Category
Spiral-Point Extension Taps
Available to Order
Also known as:1295401OSG
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Phone
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Technical Specifications

OSG
Manufacturer Part Number
1295401
Type
H3 / 2B-3B, Plug Chamfer, Black Oxide High Speed Steel
Flute
3

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

Product Description

The OSG Extension Tap (MPN 1295401) is a 7/16"-14 UNC spiral-point extension tap with a plug chamfer, black oxide high-speed steel construction, and three flutes. It is specified as H3 / 2B-3B, designed for threading applications requiring extended reach.

Frequently Asked Questions

What is the OSG Extension Tap 7/16"-14 UNC used for?

This OSG extension tap is used for threading blind or deep holes in metalwork, particularly where standard taps cannot reach. It is common in automotive, aerospace, and general manufacturing for creating internal UNC threads with a plug chamfer and three-flute design for chip evacuation.

What are the specifications of the OSG Extension Tap MPN 1295401?

The OSG Extension Tap MPN 1295401 has a 7/16"-14 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, plug chamfer, and is made of black oxide high-speed steel. It is a spiral-point extension tap designed for through-hole threading in harder materials.

Where to buy the OSG Extension Tap 7/16"-14 UNC worldwide?

You can source the OSG Extension Tap 7/16"-14 UNC (MPN 1295401) 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 project?

To select the correct OSG extension tap, match the thread size (e.g., 7/16"-14 UNC), tolerance class (H3 / 2B-3B), and chamfer type (plug) to your material and hole depth. For deep or blind holes, a spiral-point or extension design aids chip removal. Consult OSG's technical data for material-specific speeds and feeds.

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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Spiral-point extension tap for threading blind or through holes in hard-to-reach areas. Features a plug chamfer and 2 flutes. Made from black oxide high-speed steel. Thread class H3 / 2B-3B. Suitable for general metalworking applications where standard taps cannot reach
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Spiral-point extension tap for threading blind or through holes in hard-to-reach areas. Features a plug chamfer and 2 flutes. Made from black oxide high-speed steel. Thread class H3 / 2B-3B. Suitable for general metalworking applications where standard taps cannot reach
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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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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