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OSG #12-28 UNF Spiral-Flute Extension Tap - Spiral-Flute Extension Taps for Multiple Materials
OSGSpiral-Flute Extension Taps for Multiple Materials

OSG #12-28 UNF Spiral-Flute Extension Tap

OSG Spiral-Flute Extension Taps for Multiple Materials.

SKU 3G-OTH-311703

Brand
OSG
Item
#12-28 UNF Spiral-Flute Extension Tap
Category
Spiral-Flute Extension Taps for Multiple Materials
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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
1652501508

Technical Documents

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

Product Description

OSG Spiral-Flute Extension Taps for Multiple Materials.

Frequently Asked Questions

What is OSG Extension Tap #12-28 UNF used for?

The OSG Extension Tap #12-28 UNF is used for threading blind or deep holes in multiple materials, including steel, aluminum, and cast iron. Its spiral-flute design evacuates chips upward, while the modified bottoming chamfer allows threading close to the hole bottom. 3G Electric supplies this tap globally.

What are the specifications of OSG Extension Tap 1652501508?

The OSG Extension Tap 1652501508 has a #12-28 UNF thread size, H3 / 2B-3B tolerance class, 2-flute spiral-flute design, and modified bottoming chamfer. It is designed for threading multiple materials. 3G Electric sources and delivers this OSG tap worldwide.

Where to buy OSG Extension Tap #12-28 UNF worldwide?

3G Electric supplies the OSG Extension Tap #12-28 UNF worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us to order this OSG tap for your threading applications.

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

Select an OSG extension tap based on thread size (e.g., #12-28 UNF), material type, and hole depth. For blind holes, use a modified bottoming chamfer. The spiral-flute design aids chip evacuation. 3G Electric can help you choose the right OSG tap for your application.

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 multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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This spiral-flute extension tap is designed for threading blind or deep holes in multiple materials. The spiral-flute design evacuates chips upward, and the modified bottoming chamfer allows threading close to the hole bottom. It has a #12-24 UNC thread size with H3 tolerance for 2B or 3B thread classes
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Spiral-flute extension tap for threading blind holes in multiple materials. The spiral-flute design evacuates chips upward, enabling deep-hole tapping. Modified bottoming chamfer allows threading close to the hole bottom. Thread size 5/16-24 UNF, thread limit H4 / 2B-3B, 3 flutes
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Spiral-flute extension tap for threading blind or deep holes in multiple materials. The spiral-flute design evacuates chips upward, and the modified bottoming chamfer allows threading close to the hole bottom. Thread size: 1/4"-28 UNF, tolerance H4 / 2B-3B, 2-flute design
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