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OSG Spiral Flute Tap: 1/4"-28 UNF, H5 / 2B-3B, 3 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 1/4"-28 UNF, H5 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (1/4"-28 UNF, MPN 2940401) is a general-purpose tap with an H5 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. 3G Electric interprets demand and delivers this genuine…

SKU 3G-OTH-231186

Brand
OSG
Item
Spiral Flute Tap: 1/4"-28 UNF, H5 / 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
2940401
Type
H5 / 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 (1/4"-28 UNF, MPN 2940401) is a general-purpose tap with an H5 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. 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 2940401 used for?

The OSG spiral flute tap 2940401 is designed for threading blind holes in materials such as steel and aluminum. Its spiral flute design lifts chips upward, preventing clogging and ensuring clean threads. It is commonly used in automotive, aerospace, and general manufacturing applications.

What are the specifications of the OSG spiral flute tap 1/4-28 UNF?

This OSG tap has a 1/4-28 UNF thread size, H5 tolerance for 2B-3B class fit, 3 flutes, and a modified bottoming chamfer. The manufacturer part number is 2940401. It is designed for precise threading in blind holes, with a spiral flute geometry that efficiently evacuates chips.

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 times on the OSG spiral flute tap 2940401 and other cutting tools.

How to select the right OSG tap for blind holes?

For blind holes, choose a spiral flute tap like the OSG 2940401, which pushes chips out of the hole. Ensure the tap has a modified bottoming chamfer for threading close to the hole bottom. Match the thread size (e.g., 1/4-28 UNF) and tolerance (H5) to your application requirements.

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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General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. Features 3 flutes and a modified bottoming chamfer for threading close to the bottom of blind holes. Tolerance class H5 suitable for 2B-3B fit. Thread size 1/4"-20 UNC
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General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. Features 3 flutes and a modified bottoming chamfer for threading close to the bottom of blind holes. Tolerance class H5 suitable for 2B-3B fit. Thread size 1/4"-20 UNC
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General purpose spiral-flute tap with 3/8"-24 UNF thread, H5 tolerance for 2B-3B fit, 3 flutes, and modified bottoming chamfer. Designed for threading blind holes in steel and aluminum, the spiral flute evacuates chips upward to prevent clogging. Suitable for automotive, aerospace, and general manufacturing applications
OSG Spiral Flute Tap: 5/16"-18 UNC, H5 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2940801)
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OSG Spiral Flute Tap: 5/16"-18 UNC, H5 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2940801)
General purpose spiral-flute tap with thread size 1 1/8"-12 UNF, H5 tolerance for class 2B-3B fit, 4 flutes, and modified bottoming chamfer. Designed for threading blind holes in steel and stainless steel; spiral flute evacuates chips upward to prevent clogging. Suitable for automotive, aerospace, and general manufacturing applications
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General purpose spiral-flute tap with thread size 1 1/8"-12 UNF, H5 tolerance for class 2B-3B fit, 4 flutes, and modified bottoming chamfer. Designed for threading blind holes in steel and stainless steel; spiral flute evacuates chips upward to prevent clogging. Suitable for automotive, aerospace, and general manufacturing applications
OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2935401)
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OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2935401)

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