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OSG Extension Tap: #12-28 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer - Spiral-Point Extension Taps for Multiple Materials
OSGSpiral-Point Extension Taps for Multiple Materials

OSG Extension Tap: #12-28 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer

The OSG Extension Tap (#12-28 UNF) is a spiral-point extension tap for multiple materials, featuring a H3 / 2B-3B tolerance, plug chamfer, V coated powdered metal construction, and 3 flutes (MPN 1653501908). 3G…

SKU 3G-OTH-402395

Brand
OSG
Item
Extension Tap: #12-28 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer
Category
Spiral-Point Extension Taps for Multiple Materials
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Technical Specifications

OSG
Manufacturer Part Number
1653501908
Type
H3 / 2B-3B, Plug Chamfer, V Coated Powdered Metal
Flute
3
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Extension Tap (#12-28 UNF) is a spiral-point extension tap for multiple materials, featuring a H3 / 2B-3B tolerance, plug chamfer, V coated powdered metal construction, and 3 flutes (MPN 1653501908). 3G Electric interprets customer demand and delivers this genuine industrial cutting tool across 14 departments — with specialist depth in combustion, pumps and controls as an authorised distributor — ensuring you get the right answer, not just a catalog.

Frequently Asked Questions

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

This OSG extension tap is designed for threading #12-28 UNF holes in multiple materials. Its 3-flute, plug chamfer design and V coated powdered metal construction provide durability and chip evacuation in production environments. It is commonly used in automotive, aerospace, and general manufacturing applications.

What are the specifications of the OSG Extension Tap 1653501908?

The OSG Extension Tap MPN 1653501908 is a #12-28 UNF size with H3 / 2B-3B thread class. It has 3 flutes, a plug chamfer, and a V coated powdered metal body. This spiral-point extension tap is designed for through-hole threading in multiple materials.

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

3G Electric supplies the OSG Extension Tap #12-28 UNF (MPN 1653501908) worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to select the correct OSG extension tap for UNF threads?

Select an OSG extension tap by matching the thread size (e.g., #12-28 UNF), thread class (H3 / 2B-3B), and material compatibility. For deep or hard-to-reach holes, choose a spiral-point design with appropriate flute count and coating. OSG's V coated powdered metal taps offer wear resistance for production runs.

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 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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