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OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute

The OSG Spiral Flute Tap (7/8"-14 UNF, MPN 2939208) is a general-purpose spiral-flute tap with a modified bottoming chamfer, 4 flutes, and H4 / 2B-3B tolerance class. 3G Electric interprets demand and delivers this…

SKU 3G-OTH-229956

Brand
OSG
Item
Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute
Category
General Purpose Spiral-Flute Taps
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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
2939208
Type
H4 / 2B-3B, Modified Bottoming Chamfer
Flute
4

Technical Documents

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

Product Description

The OSG Spiral Flute Tap (7/8"-14 UNF, MPN 2939208) is a general-purpose spiral-flute tap with a modified bottoming chamfer, 4 flutes, and H4 / 2B-3B tolerance class. 3G Electric interprets demand and delivers this genuine industrial cutting tool across 14 departments — with specialist depth in combustion, pumps, and controls as an authorised distributor.

Frequently Asked Questions

What is the OSG spiral flute tap 7/8"-14 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in ferrous and non-ferrous materials. The spiral flute design evacuates chips upward, making it ideal for through-hole and deep-hole tapping applications in general manufacturing and maintenance.

What are the specifications of the OSG spiral flute tap 2939208?

The OSG spiral flute tap has a 7/8"-14 UNF thread size, H4 / 2B-3B tolerance, 4 flutes, and a modified bottoming chamfer. It is a general purpose tap suitable for producing threads to Class 2B or 3B fit in blind holes.

Where to buy the OSG spiral flute tap 7/8"-14 UNF worldwide?

3G Electric supplies the OSG spiral flute tap MPN 2939208 worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this precision threading tool globally.

How to select the correct OSG spiral flute tap for blind holes?

For blind holes, choose a spiral flute tap like this OSG model with a modified bottoming chamfer. The 4-flute design and H4 / 2B-3B tolerance ensure accurate thread depth. Match the tap to your material and thread class; OSG taps are engineered for consistent 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 general purpose spiral-flute taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
OSG Spiral Flute Tap: 1"-12 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2939608)
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OSG Spiral Flute Tap: 1"-12 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2939608)
OSG Spiral Flute Tap: 1"-12 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2939600)
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OSG Spiral Flute Tap: 1"-12 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2939600)
OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2939200)
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OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2939200)
OSG Spiral Flute Tap: 1/4"-20 UNC, H7 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2940200)
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OSG Spiral Flute Tap: 1/4"-20 UNC, H7 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2940200)
OSG Spiral Flute Tap: 1/4"-20 UNC, H7 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2940208)
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OSG Spiral Flute Tap: 1/4"-20 UNC, H7 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2940208)
OSG Spiral Flute Tap: 5/16"-24 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2931208)
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OSG Spiral Flute Tap: 5/16"-24 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2931208)

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