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OSG Extension Tap: 7/16"-20 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer - Spiral-Point Extension Taps
OSGSpiral-Point Extension Taps

OSG Extension Tap: 7/16"-20 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer

The OSG Extension Tap (7/16"-20 UNF, MPN 2105200) is a spiral-point extension tap with a plug chamfer, made from high-speed steel. It features 3 flutes and is rated H3 / 2B-3B. 3G Electric sources this genuine…

SKU 3G-OTH-313575

Brand
OSG
Item
Extension Tap: 7/16"-20 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer
Category
Spiral-Point Extension Taps
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Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
2105200
Type
H3 / 2B-3B, Plug Chamfer, High Speed Steel
Flute
3

Technical Documents

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

Product Description

The OSG Extension Tap (7/16"-20 UNF, MPN 2105200) is a spiral-point extension tap with a plug chamfer, made from high-speed steel. It features 3 flutes and is rated H3 / 2B-3B. 3G Electric sources this genuine industrial tool across 14 departments, with specialist expertise in combustion, pumps, and controls ensuring accurate fulfillment.

Frequently Asked Questions

What is an OSG extension tap used for?

An OSG extension tap is used to thread deep or hard-to-reach holes in metal parts. The extended shank allows access where standard taps cannot reach, making it essential for machining, automotive, and aerospace applications. 3G Electric supplies this OSG 7/16"-20 UNF tap globally.

What are the specifications of the OSG 2105200 extension tap?

The OSG 2105200 is a 7/16"-20 UNF spiral-point extension tap with a plug chamfer, H3 / 2B-3B tolerance, 3 flutes, and high-speed steel construction. It is designed for threading blind or through holes in steel and other materials. 3G Electric sources this genuine OSG tap for worldwide delivery.

Where to buy OSG extension taps in worldwide?

3G Electric supplies OSG extension taps, including the 2105200 model, to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this 7/16"-20 UNF tap. We source genuine OSG tooling for industrial applications.

How to select the correct OSG extension tap for a job?

Select an OSG extension tap based on thread size (e.g., 7/16"-20 UNF), material (high-speed steel for general use), chamfer type (plug for blind holes), and flute count (3 for spiral-point). Match the H3 / 2B-3B tolerance to your thread class requirement. 3G Electric can help you choose the right tap.

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-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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Cross-referenced by specification & description
OSG Extension Tap: 5/16"-24 UNF, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 2103600)
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OSG Extension Tap: 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, Black Oxide High Speed Steel (MPN 2103801)
OSG Extension Tap: 7/16"-14 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1295400)
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OSG Extension Tap: 7/16"-14 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1295400)
OSG Extension Tap: 1/4"-28 UNF, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1295100)
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OSG Extension Tap: 1/4"-28 UNF, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1295100)

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OSG Extension Tap: #6-32 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1294100)
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OSG Extension Tap: #8-32 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1294300)
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OSG Extension Tap: #8-32 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1294300)