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OSG Spiral Flute Tap: 3/8"-16 UNC, H2 / 2B-3B, 3 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 3/8"-16 UNC, H2 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (3/8"-16 UNC, MPN 2931508) is a general-purpose spiral-flute tap with an H2 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. This tool is designed for threading applications…

SKU 3G-OTH-230656

Brand
OSG
Item
Spiral Flute Tap: 3/8"-16 UNC, H2 / 2B-3B, 3 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
2931508
Type
H2 / 2B-3B, Modified Bottoming Chamfer
Flute
3

Technical Documents

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

Product Description

The OSG Spiral Flute Tap (3/8"-16 UNC, MPN 2931508) is a general-purpose spiral-flute tap with an H2 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. This tool is designed for threading applications requiring precise internal threads in through or blind holes.

Frequently Asked Questions

What is an OSG spiral flute tap used for?

An OSG spiral flute tap is used for threading blind holes in materials like steel and aluminum. Its spiral design pushes chips upward, preventing clogging and ensuring clean threads. This 3/8"-16 UNC tap with a modified bottoming chamfer is ideal for general-purpose threading in manufacturing and maintenance applications.

What are the specifications of the OSG 2931508 tap?

The OSG 2931508 is a 3/8"-16 UNC spiral flute tap with 3 flutes, a modified bottoming chamfer, and an H2 / 2B-3B tolerance class. It is designed for general-purpose threading in blind holes, providing efficient chip evacuation and consistent thread quality in steel and non-ferrous materials.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps worldwide, handling full logistics and customs clearance for international orders. As a global industrial solutions provider, we source genuine OSG cutting tools like the 2931508 spiral flute tap and deliver them to your facility, ensuring compliance with local import requirements.

How to select the right OSG tap for UNC threads?

Select an OSG tap by matching the thread size (e.g., 3/8"-16 UNC), chamfer type (modified bottoming for blind holes), and tolerance class (H2 for 2B-3B fit). Consider material hardness and hole depth. For general-purpose threading, a spiral flute design like the OSG 2931508 provides reliable chip removal and thread accuracy.

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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