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OSG 5/16"-18 UNC Spiral-Point Extension Tap - Spiral-Point Extension Taps
OSGSpiral-Point Extension Taps

OSG 5/16"-18 UNC Spiral-Point Extension Tap

The OSG Extension Tap (SKU 3G-OTH-313564) is a 5/16"-18 UNC spiral-point extension tap, type H3 / 2B-3B with a plug chamfer, made from black oxide high speed steel and featuring 3 flutes (MPN 1293701). 3G Electric…

SKU 3G-OTH-313564

Brand
OSG
Item
5/16"-18 UNC Spiral-Point Extension Tap
Part Number
1293701
Category
Spiral-Point Extension Taps
Available to Order
Also known as:1293701OSG
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Technical Specifications

OSG
Manufacturer Part Number
1293701
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 (SKU 3G-OTH-313564) is a 5/16"-18 UNC spiral-point extension tap, type H3 / 2B-3B with a plug chamfer, made from black oxide high speed steel and featuring 3 flutes (MPN 1293701). 3G Electric interprets your demand for this specific threading tool and sources it from our global network, backed by specialist expertise across 14 industrial departments.

Frequently Asked Questions

What is the OSG Extension Tap 5/16"-18 UNC used for?

The OSG Extension Tap is used for threading blind or deep holes in metalworking applications. Its extended length allows access to recessed areas where standard taps cannot reach. It is commonly used in automotive, aerospace, and general manufacturing for creating internal threads in steel and other materials.

What are the specifications of the OSG Extension Tap MPN 1293701?

The OSG Extension Tap has a 5/16"-18 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is made from black oxide high-speed steel. The tap is designed for spiral-point geometry to push chips forward, making it suitable for through-hole or deep-hole threading.

Where to buy the OSG Extension Tap 5/16"-18 UNC worldwide?

You can source the OSG Extension Tap MPN 1293701 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 supply genuine OSG taps for manufacturing and maintenance needs.

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

To select the correct OSG Extension Tap, match the thread size (e.g., 5/16"-18 UNC), tolerance class (H3 / 2B-3B), and chamfer type (plug) to your application. Consider material hardness and hole depth; black oxide high-speed steel suits general-purpose threading. For extended reach, verify the tap's overall length meets your clearance requirements.

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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