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OSG 5/8"-11 UNC Spiral-Point Extension Tap - Spiral-Point Extension Taps
OSGSpiral-Point Extension Taps

OSG 5/8"-11 UNC Spiral-Point Extension Tap

The OSG Extension Tap (5/8"-11 UNC, MPN 1295600) is a spiral-point extension tap with a plug chamfer, made from high-speed steel. It features an H3 / 2B-3B tolerance class and 3 flutes, designed for threading…

SKU 3G-OTH-313541

Brand
OSG
Item
5/8"-11 UNC Spiral-Point Extension Tap
Part Number
1295600
Category
Spiral-Point Extension Taps
Available to Order
Also known as:1295600OSG
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Technical Specifications

OSG
Manufacturer Part Number
1295600
Type
H3 / 2B-3B, Plug Chamfer, High Speed Steel
Flute
3

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

Product Description

The OSG Extension Tap (5/8"-11 UNC, MPN 1295600) is a spiral-point extension tap with a plug chamfer, made from high-speed steel. It features an H3 / 2B-3B tolerance class and 3 flutes, designed for threading applications requiring extended reach.

Frequently Asked Questions

What is an OSG extension tap used for?

An OSG extension tap is used to cut internal threads in hard-to-reach or deep-hole applications. The extended shank allows threading in recessed areas, blind holes, or where standard taps cannot reach. It is commonly used in machining, automotive, and general manufacturing for UNC threads.

What are the specifications of the OSG 5/8"-11 UNC extension tap?

This OSG extension tap has a 5/8"-11 UNC thread, H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is made from high-speed steel (HSS) and is designed for spiral-point cutting. The manufacturer part number is 1295600.

Where to buy OSG extension taps worldwide?

3G Electric supplies OSG extension taps worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this OSG 5/8"-11 UNC tap (MPN 1295600).

How to select the right OSG extension tap for deep-hole threading?

Select an OSG extension tap based on thread size, chamfer type, and material. For deep holes, choose a plug chamfer and high-speed steel for durability. Ensure the tap length exceeds the hole depth. This 5/8"-11 UNC tap with H3 tolerance suits general-purpose threading in steel and cast iron.

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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