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OSG Extension Tap: 3/8"-16 UNC, H5 / 2B-3B, 3 Flute, Plug Chamfer - Spiral-Point Extension Taps for Multiple Materials
OSGSpiral-Point Extension Taps for Multiple Materials

OSG Extension Tap: 3/8"-16 UNC, H5 / 2B-3B, 3 Flute, Plug Chamfer

The OSG Extension Tap (3/8"-16 UNC) is a spiral-point extension tap for multiple materials, featuring an H5 / 2B-3B tolerance, plug chamfer, V coated powdered metal construction, and 3 flutes (MPN 1653502908).

SKU 3G-OTH-402429

Brand
OSG
Item
Extension Tap: 3/8"-16 UNC, H5 / 2B-3B, 3 Flute, Plug Chamfer
Category
Spiral-Point Extension Taps for Multiple Materials
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Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OSG
Manufacturer Part Number
1653502908
Type
H5 / 2B-3B, Plug Chamfer, V Coated Powdered Metal
Flute
3

Technical Documents

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

Product Description

The OSG Extension Tap (3/8"-16 UNC) is a spiral-point extension tap for multiple materials, featuring an H5 / 2B-3B tolerance, plug chamfer, V coated powdered metal construction, and 3 flutes (MPN 1653502908).

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 multiple materials. Its extended reach allows tapping in confined spaces or deep bores where standard taps cannot access, common in automotive, aerospace, and general machining applications.

What are the specifications of the OSG extension tap 3/8-16 UNC?

This OSG extension tap has a 3/8-16 UNC thread size, H5 / 2B-3B tolerance, 3 flutes, plug chamfer, and V coated powdered metal construction. The manufacturer part number is 1653502908. It is designed for threading multiple materials with extended reach.

Where to buy OSG extension taps worldwide?

3G Electric supplies OSG extension taps worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source and deliver genuine OSG cutting tools to your facility, ensuring compliance with international shipping requirements.

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

Select an OSG extension tap based on thread size (e.g., 3/8-16 UNC), material type, and required reach. For deep holes, choose a tap with sufficient length and appropriate coating like V coated powdered metal for wear resistance. Always match the chamfer type (plug) to the 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-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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OSG Spiral Point Tap: 13/16"-20 UNEF, H5 / 2B-3B, 3 Flute, Plug Chamfer, V Coated Powdered Metal (MPN 1651507008)
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OSG Spiral Point Tap: 3/8"-16 UNC, H5 / 2B-3B, 3 Flute, Plug Chamfer, TiN Coated Cobalt (MPN 1101512105)
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OSG Spiral Point Tap: 5/8"-18 UNF, H5 / 2B-3B, 4 Flute, Plug Chamfer, TiN Coated Cobalt (MPN 1101517905)

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