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OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 2 Flute - Spiral-Point Extension Taps for Steel & Stainless Steel
OSGSpiral-Point Extension Taps for Steel & Stainless Steel

OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 2 Flute

OSG Spiral-Point Extension Taps for Steel & Stainless Steel.

SKU 3G-OTH-313186

Brand
OSG
Item
Extension Tap: #4-40 UNC, H2 / 2B-3B, 2 Flute
Category
Spiral-Point Extension Taps for Steel & Stainless Steel
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
1766201

Technical Documents

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

Product Description

OSG Spiral-Point Extension Taps for Steel & Stainless Steel.

Frequently Asked Questions

What is the OSG #4-40 UNC extension tap used for?

The OSG #4-40 UNC extension tap is designed for threading blind or deep holes in steel and stainless steel. Its spiral-point design pushes chips forward, reducing clogging in demanding applications. The H2 / 2B-3B tolerance ensures precise thread fit for critical assemblies.

What are the specifications of the OSG 1766201 extension tap?

The OSG 1766201 is a #4-40 UNC spiral-point extension tap with a plug chamfer and 2 flutes. It has an H2 / 2B-3B thread tolerance class, making it suitable for steel and stainless steel. The extension design allows threading in hard-to-reach locations.

Where to buy the OSG 1766201 extension tap worldwide?

You can source the OSG 1766201 extension tap through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this precision threading tool.

How to select the correct OSG extension tap for steel?

For steel and stainless steel, choose an OSG spiral-point extension tap with the correct thread size and tolerance. The #4-40 UNC with H2 / 2B-3B class provides a balanced fit for general threading. Ensure the tap's flute count and chamfer match your hole depth and material hardness.

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 for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 2 Flute, Plug Chamfer (MPN 1764001)
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