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OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer - Spiral-Flute Extension Taps
OSGSpiral-Flute Extension Taps

OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer

The OSG Extension Tap (#10-24 UNC, MPN 1297000) is a spiral-flute extension tap with a plug chamfer, made from high-speed steel. It features 3 flutes and is rated H3 / 2B-3B for thread class compatibility.

SKU 3G-OTH-310983

Brand
OSG
Item
Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer
Category
Spiral-Flute Extension Taps
Available to Order
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OSG
Manufacturer Part Number
1297000
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 (#10-24 UNC, MPN 1297000) is a spiral-flute extension tap with a plug chamfer, made from high-speed steel. It features 3 flutes and is rated H3 / 2B-3B for thread class compatibility.

Frequently Asked Questions

What is the OSG #10-24 UNC extension tap used for?

The OSG #10-24 UNC extension tap is used for threading blind holes in hard-to-reach areas. Its 3-flute spiral-flute design evacuates chips upward, making it ideal for through-hole and blind-hole threading in steel and other materials. The H3 tolerance ensures precise thread fit for 2B-3B classes.

What are the specifications of the OSG 1297000 extension tap?

The OSG 1297000 is a #10-24 UNC extension tap with H3 / 2B-3B tolerance, plug chamfer, and 3 flutes. It is made of high-speed steel (HSS) and features a spiral-flute design for chip evacuation. The manufacturer part number is 1297000, and it is designed for threading in confined spaces.

Where to buy the OSG 1297000 extension tap worldwide?

You can source the OSG 1297000 extension tap worldwide through 3G Electric. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply genuine OSG tooling to procurement teams globally.

How to select the correct OSG extension tap for UNC threads?

To select the correct OSG extension tap, match the thread size (e.g., #10-24 UNC) and tolerance class (H3 for 2B-3B fit). Choose plug chamfer for blind holes and spiral-flute design for chip removal. Verify the tap's reach length suits your application. OSG high-speed steel taps offer durability for general-purpose threading in steel.

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-flute 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: #10-24 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1297200)
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OSG Extension Tap: #8-32 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1296800)
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OSG Extension Tap: #8-32 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1296800)
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OSG Extension Tap: #6-32 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1296400)
OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1296000)
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OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 2 Flute, Plug Chamfer, High Speed Steel (MPN 1296000)
OSG Extension Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer, High Speed Steel (MPN 1297700)
OSG
OSG Extension Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer, High Speed Steel (MPN 1297700)

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OSG Extension Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1297600)
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OSG Extension Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1297600)
OSG Extension Tap: 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer, High Speed Steel (MPN 1298700)
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OSG Extension Tap: 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer, High Speed Steel (MPN 1298700)