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

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

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

SKU 3G-OTH-315309

Brand
OSG
Item
Extension Tap: #4-40 UNC, H2 / 2B-3B, 3 Flute
Category
Spiral-Flute Extension Taps for Steel & Stainless Steel
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

OSG
Manufacturer Part Number
1766101

Technical Documents

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

Product Description

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

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

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 steel and stainless steel. Its extended reach and spiral-flute design efficiently evacuate chips, making it ideal for automotive, aerospace, and general machining applications where standard taps cannot access the workpiece.

What are the specifications of the OSG extension tap #4-40 UNC?

This OSG extension tap is #4-40 UNC with a H2 / 2B-3B thread limit, 3 flutes, and a modified bottoming chamfer. It is designed for steel and stainless steel. The manufacturer part number is 1766101. These specs ensure precise threading in demanding materials.

Where to buy OSG extension taps worldwide?

3G Electric supplies OSG extension taps worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this #4-40 UNC tap to your facility. Contact us for availability and lead time on this and other OSG tooling.

How to select the right OSG extension tap for steel?

Select an OSG extension tap based on thread size, material, and hole depth. For steel and stainless steel, use a spiral-flute design like this #4-40 UNC tap with a modified bottoming chamfer. Match the H2 / 2B-3B tolerance to your required thread class for optimal fit and performance.

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 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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Cross-referenced by specification & description
This extension tap features a spiral-flute design that evacuates chips upward, suited for threading blind holes in steel and stainless steel. With a #8-32 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer, it enables threading close to the hole bottom in deep-hole applications
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This extension tap features a spiral-flute design that evacuates chips upward, suited for threading blind holes in steel and stainless steel. With a #8-32 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer, it enables threading close to the hole bottom in deep-hole applications
OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1767101)
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OSG Extension Tap: #10-24 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1767101)
This spiral-flute extension tap is designed for threading blind holes in steel and stainless steel. The spiral-flute design evacuates chips upward to prevent clogging, while the modified bottoming chamfer allows threading close to the hole bottom. It features a 7/16"-14 UNC thread size, H3 / 2B-3B tolerance, and a 3-flute configuration
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This spiral-flute extension tap is designed for threading blind holes in steel and stainless steel. The spiral-flute design evacuates chips upward to prevent clogging, while the modified bottoming chamfer allows threading close to the hole bottom. It features a 7/16"-14 UNC thread size, H3 / 2B-3B tolerance, and a 3-flute configuration
OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0143701)
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OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 0143701)
OSG Extension Tap: #6-32 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1766301)
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OSG Extension Tap: #6-32 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1766301)
OSG Extension Tap: #8-32 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1766901)
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OSG Extension Tap: #8-32 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 1766901)

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Spiral-flute extension tap for threading blind holes in steel and stainless steel. Features a #8-32 UNC thread size, H3 / 2B-3B thread class, 3 flutes, and a bottoming chamfer. The spiral-flute design evacuates chips upward, enabling deep-hole tapping and threading close to the hole bottom
Spiral-flute extension tap for threading blind holes in steel and stainless steel. The spiral-flute design evacuates chips upward, preventing clogging, while the extended reach allows access to deep or recessed areas. Thread size #10-32 UNF, H3 / 2B-3B tolerance, 3 flutes, modified bottoming chamfer
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Spiral-flute extension tap for threading blind holes in steel and stainless steel. The spiral-flute design evacuates chips upward, preventing clogging, while the extended reach allows access to deep or recessed areas. Thread size #10-32 UNF, H3 / 2B-3B tolerance, 3 flutes, modified bottoming chamfer
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