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OSG 7/16"-20 UNF Spiral-Flute Extension Tap - Spiral-Flute Extension Taps for Multiple Materials
OSGSpiral-Flute Extension Taps for Multiple Materials

OSG 7/16"-20 UNF Spiral-Flute Extension Tap

OSG Spiral-Flute Extension Taps for Multiple Materials.

SKU 3G-OTH-311707

Brand
OSG
Item
7/16"-20 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
1652503108

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 an OSG extension tap used for?

An OSG extension tap is used for threading hard-to-reach holes in multiple materials. Its extended reach allows tapping deep or obstructed locations without sacrificing alignment, making it essential for maintenance, repair, and production in machining, automotive, and general industrial applications.

What are the specifications of the OSG 7/16"-20 UNF extension tap?

This OSG extension tap has a 7/16"-20 UNF thread size, H5 tolerance for 2B-3B class fit, 3 flutes, and a modified bottoming chamfer. The spiral-flute design aids chip evacuation in through-hole and blind-hole tapping. Part number 1652503108.

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 genuine OSG tooling and deliver to your facility. Contact us for pricing and lead time on this 7/16"-20 UNF tap.

How to select the right OSG extension tap for a job?

Select an OSG extension tap based on thread size (e.g., 7/16"-20 UNF), material type, hole depth, and chamfer style. For blind holes, use a modified bottoming chamfer; for through holes, a plug chamfer works. Match flute design (spiral for chip evacuation) to 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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