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OSG Extension Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer - Spiral-Flute Extension Taps
OSGSpiral-Flute Extension Taps

OSG Extension Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer

The OSG Extension Tap (#10-32 UNF, MPN 1297600) is a spiral-flute 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-310967

Brand
OSG
Item
Extension Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer
Category
Spiral-Flute Extension Taps
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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
1297600
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 (#10-32 UNF, MPN 1297600) is a spiral-flute 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 #10-32 UNF size with plug chamfer and spiral-flute design is ideal for through-hole threading in metalworking, automotive, and general manufacturing where standard taps cannot reach.

What are the specifications of the OSG #10-32 UNF extension tap?

This OSG extension tap is #10-32 UNF thread size, H3 / 2B-3B fit, 3-flute, plug chamfer, made of high-speed steel. The spiral-flute design aids chip evacuation in deep-hole tapping. Manufacturer part number is 1297600.

Where to buy OSG extension taps worldwide?

3G Electric supplies OSG extension taps worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the #10-32 UNF spiral-flute tap (MPN 1297600) and other OSG tooling.

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

Select an OSG extension tap based on thread size (e.g., #10-32 UNF), chamfer type (plug for through-holes), flute design (spiral for chip evacuation), and reach length. Ensure the tap's H3 tolerance matches your required thread class (2B-3B). Consult OSG's technical data for material-specific speeds.

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: #10-24 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1297200)
OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1297000)
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OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1297000)
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, Bottoming Chamfer, High Speed Steel (MPN 1297700)
OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer, High Speed Steel (MPN 1297300)
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OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Bottoming Chamfer, High Speed Steel (MPN 1297300)
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)
OSG Extension Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1298200)
OSG
OSG Extension Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer, High Speed Steel (MPN 1298200)

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