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OSG #3-56 UNF General Purpose Spiral-Flute Tap - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG #3-56 UNF General Purpose Spiral-Flute Tap

The OSG Spiral Flute Tap (#3-56 UNF, MPN 2984605) is a general-purpose spiral-flute tap with a 2B-3B thread class, bottoming chamfer, and TiN-coated high-speed steel construction. It features 2 flutes and is designed…

SKU 3G-OTH-231199

Brand
OSG
Item
#3-56 UNF General Purpose Spiral-Flute Tap
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
2984605
Type
2B-3B, Bottoming Chamfer, TiN Coated High Speed Steel
Flute
2

Technical Documents

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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Spiral Flute Tap (#3-56 UNF, MPN 2984605) is a general-purpose spiral-flute tap with a 2B-3B thread class, bottoming chamfer, and TiN-coated high-speed steel construction. It features 2 flutes and is designed for threading applications requiring a bottoming chamfer geometry.

Frequently Asked Questions

What is the OSG Spiral Flute Tap #3-56 UNF used for?

The OSG Spiral Flute Tap #3-56 UNF is designed for threading blind holes in ferrous and non-ferrous materials. Its spiral flute design evacuates chips upward, preventing clogging and ensuring clean threads. 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 2984605?

The OSG Spiral Flute Tap (MPN 2984605) has a #3-56 UNF thread size, 2 flute design, and bottoming chamfer for threading to the bottom of blind holes. It is made of TiN-coated high-speed steel and is rated for class of fit 2B-3B. This tap is suitable for general-purpose threading in production environments.

Where to buy OSG taps in worldwide?

You can source OSG taps, including the Spiral Flute Tap #3-56 UNF, through 3G Electric. As a global industrial equipment distributor since 1990, 3G Electric handles full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this and other OSG tooling.

How to select the correct OSG tap for blind holes?

For blind holes, choose a bottoming chamfer tap like the OSG Spiral Flute Tap #3-56 UNF, which threads close to the hole bottom. Ensure the tap's flute design matches the material: spiral flute for chip evacuation upward. Match thread size (e.g., #3-56 UNF) and class of fit (2B-3B) 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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Cross-referenced by specification & description
This general purpose spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. It features a bottoming chamfer for threading to the bottom of the hole, and the spiral flute design evacuates chips upward to prevent clogging. Constructed from black oxide high-speed steel for wear resistance, it has a #3-56 UNF thread size with a 2B-3B class of fit and 2 flutes
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This general purpose spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. It features a bottoming chamfer for threading to the bottom of the hole, and the spiral flute design evacuates chips upward to prevent clogging. Constructed from black oxide high-speed steel for wear resistance, it has a #3-56 UNF thread size with a 2B-3B class of fit and 2 flutes
OSG Spiral Flute Tap: #3-48 UNC, 2B-3B, 2 Flute, Bottoming Chamfer, TiN Coated High Speed Steel (MPN 2984505)
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OSG Spiral Flute Tap: #5-40 UNC, 2B-3B, 2 Flute, Bottoming Chamfer, TiN Coated High Speed Steel (MPN 2986505)
High speed steel spiral-flute tap with #3-56 UNF thread size, 2 flute design, and bottoming chamfer. Rated for thread classes 2B-3B. Suitable for threading blind holes in materials such as steel and aluminum, where chip evacuation upward is required to prevent clogging
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High speed steel spiral-flute tap with #3-56 UNF thread size, 2 flute design, and bottoming chamfer. Rated for thread classes 2B-3B. Suitable for threading blind holes in materials such as steel and aluminum, where chip evacuation upward is required to prevent clogging
OSG Spiral Flute Tap: #3-48 UNC, 2B-3B, 2 Flute, Bottoming Chamfer, High Speed Steel (MPN 2984500)
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OSG Spiral Flute Tap: #3-48 UNC, 2B-3B, 2 Flute, Bottoming Chamfer, High Speed Steel (MPN 2984500)
OSG Spiral Flute Tap: #5-40 UNC, 2B-3B, 2 Flute, Bottoming Chamfer, High Speed Steel (MPN 2986500)
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OSG Spiral Flute Tap: #5-40 UNC, 2B-3B, 2 Flute, Bottoming Chamfer, High Speed Steel (MPN 2986500)

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General purpose spiral-flute tap for threading blind holes. Constructed from black oxide high-speed steel with 3 flutes for upward chip evacuation. Features a bottoming chamfer and 2B thread class. Suitable for ferrous and non-ferrous materials
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General purpose spiral-flute tap for threading blind holes. The spiral flute design evacuates chips upward to prevent clogging. Suitable for use in steel and stainless steel
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