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

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

The OSG Spiral Flute Tap (1/4"-28 UNF, MPN 2985701) is a general-purpose spiral-flute tap with a 2B thread class, bottoming chamfer, and black oxide high-speed steel construction. It features 3 flutes for efficient…

SKU 3G-OTH-229888

Brand
OSG
Item
Spiral Flute Tap: 1/4"-28 UNF, 2B, 3 Flute, Bottoming Chamfer
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
2985701
Type
2B, Bottoming Chamfer, Black Oxide High Speed Steel
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 2985701) is a general-purpose spiral-flute tap with a 2B thread class, bottoming chamfer, and black oxide high-speed steel construction. It features 3 flutes for efficient chip evacuation in through-hole threading applications.

Frequently Asked Questions

What is the OSG spiral flute tap 2985701 used for?

The OSG spiral flute tap 2985701 is used for threading blind holes in materials like steel and aluminum. Its spiral flute design evacuates chips upward, preventing clogging. It is ideal for automotive, aerospace, and general manufacturing applications requiring precise internal threads.

What are the specifications of the OSG spiral flute tap 2985701?

The OSG spiral flute tap 2985701 has a 1/4\"-28 UNF thread size, 2B class fit, 3 flutes, and a bottoming chamfer. It is made of black oxide high-speed steel (HSS) for wear resistance. The manufacturer part number is 2985701.

Where to buy the OSG spiral flute tap 2985701 worldwide?

You can source the OSG spiral flute tap 2985701 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.

How to select the correct OSG spiral flute tap for blind holes?

For blind holes, choose a spiral flute tap like the OSG 2985701 with a bottoming chamfer to thread near the hole bottom. Ensure the tap matches the thread size (1/4\"-28 UNF) and material (black oxide HSS for general use). Use proper cutting fluid and speed for best results.

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 in ferrous materials. The spiral flute geometry lifts chips upward, reducing clogging and producing clean threads. It features a bottoming chamfer for threading to the bottom of the hole. Made from black oxide high-speed steel for wear resistance and improved lubricity
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This spiral-flute tap is designed for threading blind holes in ferrous materials. The spiral flute geometry lifts chips upward, reducing clogging and producing clean threads. It features a bottoming chamfer for threading to the bottom of the hole. Made from black oxide high-speed steel for wear resistance and improved lubricity
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General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. Features a bottoming chamfer for threading to the bottom of blind holes, and 3 flutes for upward chip evacuation. Made from black oxide high-speed steel for wear resistance and reduced friction. Thread size 3/8"-16 UNC, class 2B fit
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