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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 2931501) 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-230648

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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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
2931501
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 2931501) 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 the OSG spiral flute tap 3/8-16 UNC 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, preventing clogging. It is commonly used in automotive, aerospace, and general machining applications where clean, accurate threads are required.

What are the specifications of the OSG 2931501 tap?

The OSG 2931501 is a 3/8-16 UNC spiral flute tap with a modified bottoming chamfer. It has 3 flutes and a thread tolerance of H2 / 2B-3B. This tap is suitable for producing threads in blind holes and is made by OSG, a leading cutting tool manufacturer.

Where to buy OSG taps in worldwide?

3G Electric supplies OSG taps worldwide, including the 2931501 spiral flute tap. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine OSG cutting tools and support your procurement needs across multiple departments.

How to select the right spiral flute tap for blind holes?

For blind holes, choose a spiral flute tap with a modified bottoming chamfer, like the OSG 2931501. Ensure the tap size matches the thread specification (e.g., 3/8-16 UNC) and the material being tapped. Use proper cutting fluid and follow manufacturer speed/feed recommendations for best thread quality.

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: 3/8"-16 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2931500)
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OSG Spiral Flute Tap: 3/8"-16 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2931500)
OSG Spiral Flute Tap: 3/8"-16 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2931508)
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OSG Spiral Flute Tap: 5/16"-18 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930608)
OSG Spiral Flute Tap: 5/16"-18 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930601)
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OSG Spiral Flute Tap: 5/16"-18 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930601)
OSG Spiral Flute Tap: 5/16"-18 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930600)
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OSG Spiral Flute Tap: 5/16"-18 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2930600)
OSG Spiral Flute Tap: 1/4"-20 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2928000)
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OSG Spiral Flute Tap: 1/4"-20 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2928000)

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