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3G Electric
OSG #4-40 UNC Spiral-Point Extension Tap, H2, 2 Flute, Plug Chamfer, HSS - Spiral-Point Extension Taps
OSGSpiral-Point Extension Taps

OSG #4-40 UNC Spiral-Point Extension Tap, H2, 2 Flute, Plug Chamfer, HSS

<p>The OSG #4-40 UNC Spiral-Point Extension Tap is a precision tool designed for threading blind or through holes in demanding applications. This tap features a spiral-point geometry that pushes chips forward…

SKU 3G-OTH-313643

Brand
OSG
Item
#4-40 UNC Spiral-Point Extension Tap, H2, 2 Flute, Plug Chamfer, HSS
Part Number
1294000
Category
Spiral-Point Extension Taps
Available to Order
Also known as:1294000OSG
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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
1294000
Type
H2 / 2B-3B, Plug Chamfer, High Speed Steel
Flute
2

Technical Documents

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

Product Description

<p>The OSG #4-40 UNC Spiral-Point Extension Tap is a precision tool designed for threading blind or through holes in demanding applications. This tap features a spiral-point geometry that pushes chips forward, reducing clogging and improving thread quality. With an H2 hardness rating, it is suitable for tapping materials up to 2B-3B class fits. The plug chamfer allows for versatile use in both starting and finishing threads.</p><p>Manufactured from high-speed steel (HSS) with a 2-flute design, this tap offers excellent wear resistance and durability. As a Singapore-based supplier, 3G Electric provides SGD quotes on request, handles GST for local buyers, and ensures fast delivery across Singapore and Southeast Asia. Worldwide shipping is also available.</p>

Frequently Asked Questions

What is the thread size and type of this OSG tap?

This tap is sized #4-40 UNC (Unified National Coarse) and features a spiral-point design with a plug chamfer. It has an H2 hardness rating and is made from high-speed steel with 2 flutes.

Can I get a quote in SGD and what are the delivery options?

Yes, 3G Electric provides SGD quotes on request. For Singapore buyers, GST is handled. We offer fast delivery across Singapore and Southeast Asia, and worldwide shipping is available.

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
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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
OSG
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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