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OSG Spiral Flute Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 1/4"-28 UNF, H3 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (1/4"-28 UNF, MPN 2930401) is a general-purpose spiral-flute tap with a modified bottoming chamfer, 3 flutes, and an H3 / 2B-3B tolerance class. 3G Electric interprets your demand for this…

SKU 3G-OTH-229886

Brand
OSG
Item
Spiral Flute Tap: 1/4"-28 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
2930401
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 (1/4"-28 UNF, MPN 2930401) is a general-purpose spiral-flute tap with a modified bottoming chamfer, 3 flutes, and an H3 / 2B-3B tolerance class. 3G Electric interprets your demand for this OEM-specified tool, sources it across our 14 industrial departments, and supports your application with specialist depth in controls and pumps.

Frequently Asked Questions

What is OSG spiral flute tap 1/4-28 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in materials such as steel and stainless steel. Its 3-flute design and modified bottoming chamfer allow chips to flow upward, preventing clogging and enabling deeper thread engagement in general-purpose machining applications.

What are the specifications of OSG tap 2930401?

The OSG tap 2930401 is a 1/4-28 UNF spiral flute tap with a H3 / 2B-3B tolerance class, 3 flutes, and a modified bottoming chamfer. It is a general-purpose tap suitable for producing threads in blind holes, with a 2B-3B fit range for standard and precision threading.

Where to buy OSG spiral flute tap 2930401 worldwide?

3G Electric supplies and delivers the OSG spiral flute tap 2930401 worldwide. As a global industrial sourcing partner, we handle logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on this OSG threading tool.

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 this OSG 1/4-28 UNF tap, to cut threads close to the hole bottom. Ensure the tap's tolerance (e.g., H3 / 2B-3B) matches your required thread fit. Use proper cutting fluid and pecking cycles to clear chips.

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 OSG spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. The spiral flute lifts chips upward, preventing clogging in deep or blind holes. With a modified bottoming chamfer, it allows threading close to the hole bottom. Tolerance H3 / 2B-3B ensures precise thread fit
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This OSG spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. The spiral flute lifts chips upward, preventing clogging in deep or blind holes. With a modified bottoming chamfer, it allows threading close to the hole bottom. Tolerance H3 / 2B-3B ensures precise thread fit
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General purpose spiral-flute tap with 1/4"-20 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, and modified bottoming chamfer. Designed for threading blind holes, the spiral flute lifts chips upward to prevent clogging and ensure clean threads. Suitable for general-purpose tapping in manufacturing and maintenance applications
OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2935401)
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This spiral-flute tap is designed for threading blind holes in materials such as steel and stainless steel. The spiral flute design evacuates chips upward, preventing clogging. The modified bottoming chamfer allows threading close to the bottom of the hole. Suitable for general manufacturing applications
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This spiral-flute tap is designed for threading blind holes in materials such as steel and stainless steel. The spiral flute design evacuates chips upward, preventing clogging. The modified bottoming chamfer allows threading close to the bottom of the hole. Suitable for 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 geometry evacuates chips upward, facilitating chip clearance in blind-hole applications. It features a modified bottoming chamfer, H3 / 2B-3B tolerance, and 3 flutes, suitable for general-purpose tapping where precise thread fit is required
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This OSG spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. The spiral flute geometry evacuates chips upward, facilitating chip clearance in blind-hole applications. It features a modified bottoming chamfer, H3 / 2B-3B tolerance, and 3 flutes, suitable for general-purpose tapping where precise thread fit is required
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This OSG spiral-flute tap is designed for threading blind holes in materials such as steel and aluminum. Its spiral flute design evacuates chips upward, preventing clogging and ensuring clean threads. It features a 1/4-28 UNF thread size, bottoming chamfer, three flutes, and H3 / 2B-3B tolerance class for precise thread fit. Suitable for general manufacturing applications
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