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OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (1/4"-28 UNF, MPN 2935408) is a general purpose spiral-flute tap with a modified bottoming chamfer, 3 flutes, and an H4 / 2B-3B tolerance class. 3G Electric interprets customer demand and…

SKU 3G-OTH-229887

Brand
OSG
Item
Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute
Category
General Purpose Spiral-Flute Taps
Available to Order
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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
2935408
Type
H4 / 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 2935408) is a general purpose spiral-flute tap with a modified bottoming chamfer, 3 flutes, and an H4 / 2B-3B tolerance class. 3G Electric interprets customer demand and delivers this genuine industrial tap across 14 departments — and far more — with specialist depth in combustion, pumps and controls as an authorised distributor for brands like OSG.

Frequently Asked Questions

What is the OSG spiral flute tap 2935408 used for?

The OSG spiral flute tap 2935408 is used for threading blind holes in materials such as steel and aluminum. Its spiral flute design evacuates chips upward, preventing clogging. The modified bottoming chamfer allows threading close to the hole bottom, making it ideal for general-purpose tapping in manufacturing and maintenance applications.

What are the specifications of the OSG spiral flute tap 2935408?

The OSG spiral flute tap 2935408 has a thread size of 1/4"-28 UNF, with a tolerance class of H4 / 2B-3B. It features 3 flutes and a modified bottoming chamfer. The manufacturer part number is 2935408. This tap is designed for general-purpose threading in blind holes.

Where to buy the OSG spiral flute tap 2935408 worldwide?

You can source the OSG spiral flute tap 2935408 worldwide through 3G Electric. As a global industrial equipment distributor, 3G Electric handles full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply genuine OSG taps to customers worldwide.

How to select the correct OSG spiral flute tap for UNF threads?

To select the correct OSG spiral flute tap for UNF threads, match the thread size (e.g., 1/4"-28 UNF) and tolerance class (e.g., H4 / 2B-3B) to your application. For blind holes, choose a spiral flute tap with a modified bottoming chamfer. OSG taps are precision-ground for consistent thread quality. 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2935400)
OSG
OSG Spiral Flute Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2935400)
OSG Spiral Flute Tap: 5/8"-18 UNF, H3 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2933408)
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OSG Spiral Flute Tap: 5/8"-18 UNF, H3 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2933408)
OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2939200)
OSG
OSG Spiral Flute Tap: 7/8"-14 UNF, H4 / 2B-3B, 4 Flute, Modified Bottoming Chamfer (MPN 2939200)
This OSG spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. It features a modified bottoming chamfer and 4 flutes to efficiently evacuate chips upward. The H3 / 2B-3B tolerance class ensures precise UNF threads. Suitable for general manufacturing applications requiring blind-hole threading
OSG
This OSG spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. It features a modified bottoming chamfer and 4 flutes to efficiently evacuate chips upward. The H3 / 2B-3B tolerance class ensures precise UNF threads. Suitable for general manufacturing applications requiring blind-hole threading
OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2932608)
OSG
OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2932608)
OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2932600)
OSG
OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2932600)

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