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OSG Spiral Flute Tap: 3/8"-24 UNF, H3 / 2B-3B, 3 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 3/8"-24 UNF, H3 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (3/8"-24 UNF, MPN 2931808) is a general-purpose spiral-flute tap with a modified bottoming chamfer, featuring an H3 / 2B-3B tolerance class and 3 flutes. 3G Electric interprets demand and…

SKU 3G-OTH-230676

Brand
OSG
Item
Spiral Flute Tap: 3/8"-24 UNF, H3 / 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
2931808
Type
H3 / 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"-24 UNF, MPN 2931808) is a general-purpose spiral-flute tap with a modified bottoming chamfer, featuring an H3 / 2B-3B tolerance class and 3 flutes. 3G Electric interprets demand and delivers this genuine OSG tap across 14 industrial departments — and we supply far more than is listed. Our specialist depth in combustion, pumps and controls (as an authorised distributor) anchors trust, but our breadth spans brands like Schneider, ABB, Siemens, SKF, Festo, Fluke, Interpump and FBR.

Frequently Asked Questions

What is the OSG spiral flute tap 3/8-24 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in materials such as steel and aluminum. The spiral flute design evacuates chips upward, preventing clogging. It is commonly used in automotive, aerospace, and general manufacturing applications where precise internal threads are required.

What are the specifications of the OSG spiral flute tap 2931808?

The OSG spiral flute tap has a thread size of 3/8-24 UNF, with a H3 / 2B-3B tolerance class. It features 3 flutes and a modified bottoming chamfer, allowing threading close to the bottom of blind holes. The manufacturer part number is 2931808.

Where to buy OSG taps in worldwide?

You can source OSG taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG spiral flute tap 2931808.

How to select the correct OSG tap for blind holes?

For blind holes, choose a spiral flute tap like this OSG model, as it pushes chips out of the hole. Ensure the thread size (3/8-24 UNF) and tolerance (H3 / 2B-3B) match your requirements. A modified bottoming chamfer allows threading closer to the hole bottom. Consult OSG's technical data for material-specific recommendations.

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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This spiral-flute tap is designed for threading blind holes, with a modified bottoming chamfer that allows threading close to the hole bottom. The 3-flute geometry lifts chips upward, preventing clogging and ensuring clean threads. Suitable for general-purpose threading in steel and stainless steel applications
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This spiral-flute tap is designed for threading blind holes, with a modified bottoming chamfer that allows threading close to the hole bottom. The 3-flute geometry lifts chips upward, preventing clogging and ensuring clean threads. Suitable for general-purpose threading in steel and stainless steel applications
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General purpose spiral-flute tap with 5/16"-24 UNF thread. H3 / 2B-3B tolerance class. Modified bottoming chamfer and 3 flutes for chip evacuation in blind hole threading. Suitable for ferrous and non-ferrous materials
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General purpose spiral-flute tap with 5/16"-18 UNC thread size. Features H3 / 2B-3B tolerance, 3 flutes, and modified bottoming chamfer for threading blind holes. Spiral flute design evacuates chips upward, suitable for ferrous and non-ferrous materials

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This OSG spiral-flute tap is designed for threading blind holes in materials such as steel and stainless steel. The 4-flute design and modified bottoming chamfer push chips forward, reducing clogging and ensuring clean threads in general-purpose machining applications. Thread size: 9/16"-18 UNF; tolerance class H3 / 2B-3B
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General purpose spiral-flute tap for threading blind holes. The spiral flute design lifts chips upward, preventing clogging in deep or blind holes. Suitable for ferrous and non-ferrous materials
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This OSG spiral-flute tap is designed for threading blind holes. The spiral flute design evacuates chips upward, preventing clogging and ensuring clean threads. It features a 3/4"-16 UNF thread size, H3 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. Suitable for general manufacturing applications requiring precise internal threads
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General purpose spiral-flute tap for threading blind holes in ferrous materials. Features 4 flutes and a modified bottoming chamfer. Chip evacuation upward prevents clogging, ensuring clean threads. Suitable for automotive, aerospace, and general manufacturing applications
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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 features a modified bottoming chamfer, 3 flutes, and H7 / 2B-3B tolerance. Suitable for general machining applications requiring clean, accurate threads
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