Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

OSG #4-40 UNC Spiral-Flute Tap, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG #4-40 UNC Spiral-Flute Tap, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer

OSG General Purpose Spiral-Flute Taps.

SKU 3G-OTH-230958

Brand
OSG
Item
#4-40 UNC Spiral-Flute Tap, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer
Category
General Purpose Spiral-Flute Taps
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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
2906408

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

OSG General Purpose Spiral-Flute Taps.

Frequently Asked Questions

What is the OSG spiral flute tap #4-40 UNC used for?

The OSG spiral flute tap #4-40 UNC is designed for threading blind holes in ferrous and non-ferrous materials. Its spiral flute design lifts chips upward, preventing clogging and ensuring clean threads. It is commonly used in automotive, aerospace, and general manufacturing applications where precise internal threading is required.

What are the specifications of the OSG spiral flute tap #4-40 UNC?

The OSG spiral flute tap #4-40 UNC has a thread size of #4-40 UNC, a H2 / 2B-3B tolerance class, and a modified bottoming chamfer. It features 3 flutes for efficient chip evacuation. The manufacturer part number is 2906408. This tap is suitable for general-purpose threading in blind holes.

Where to buy OSG spiral flute tap #4-40 UNC worldwide?

You can source the OSG spiral flute tap #4-40 UNC 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 time. We supply genuine OSG taps for industrial applications.

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

To select the correct OSG spiral flute tap for blind holes, match the thread size (e.g., #4-40 UNC) and tolerance class (e.g., H2 / 2B-3B) to your application. Choose a modified bottoming chamfer for threading close to the hole bottom. Ensure the tap material suits your workpiece—OSG taps are available for various materials.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
This spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. The spiral flute lifts chips upward, preventing clogging and ensuring clean threads. It features a #4-40 UNC thread size, H2 / 2B-3B tolerance class, 3 flutes, and a modified bottoming chamfer
OSG
This spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. The spiral flute lifts chips upward, preventing clogging and ensuring clean threads. It features a #4-40 UNC thread size, H2 / 2B-3B tolerance class, 3 flutes, and a modified bottoming chamfer
OSG Spiral Flute Tap: #5-40 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2907008)
OSG
OSG Spiral Flute Tap: #5-40 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2907008)
General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. The spiral flute design evacuates chips upward, preventing clogging and ensuring clean threads. Features #3-48 UNC thread size, H2 / 2B-3B tolerance class, 2 flutes, and modified bottoming chamfer. Suitable for general machining applications requiring precise internal threading
OSG
General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. The spiral flute design evacuates chips upward, preventing clogging and ensuring clean threads. Features #3-48 UNC thread size, H2 / 2B-3B tolerance class, 2 flutes, and modified bottoming chamfer. Suitable for general machining applications requiring precise internal threading
General purpose spiral-flute tap for threading blind holes. Thread size #6-32 UNC with H2 / 2B-3B limit, 3 flutes, and modified bottoming chamfer. Spiral flute design lifts chips upward to prevent clogging, suitable for steel, stainless steel, and aluminum
OSG
General purpose spiral-flute tap for threading blind holes. Thread size #6-32 UNC with H2 / 2B-3B limit, 3 flutes, and modified bottoming chamfer. Spiral flute design lifts chips upward to prevent clogging, suitable for steel, stainless steel, and aluminum
General purpose spiral-flute tap for threading blind holes. The spiral flute design lifts chips upward, preventing clogging. Suitable for tapping in steel and aluminum. Thread size #3-48 UNC, H2 / 2B-3B tolerance, 2 flutes, modified bottoming chamfer
OSG
General purpose spiral-flute tap for threading blind holes. The spiral flute design lifts chips upward, preventing clogging. Suitable for tapping in steel and aluminum. Thread size #3-48 UNC, H2 / 2B-3B tolerance, 2 flutes, modified bottoming chamfer
OSG Spiral Flute Tap: #6-32 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2907400)
OSG
OSG Spiral Flute Tap: #6-32 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2907400)

More from OSG

View all OSG parts
General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. #6-32 UNC size with H5 tolerance for 2B-3B class fit, 3 flutes, and modified bottoming chamfer for threading close to the hole bottom
OSG
General purpose spiral-flute tap for threading blind holes in ferrous and non-ferrous materials. #6-32 UNC size with H5 tolerance for 2B-3B class fit, 3 flutes, and modified bottoming chamfer for threading close to the hole bottom
OSG Spiral Flute Tap: #2-56 UNC, H2 / 2B-3B, 2 Flute, Modified Bottoming Chamfer (MPN 2905608)
OSG
OSG Spiral Flute Tap: #2-56 UNC, H2 / 2B-3B, 2 Flute, Modified Bottoming Chamfer (MPN 2905608)
OSG Spiral Flute Tap: #5-40 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2907000)
OSG
OSG Spiral Flute Tap: #5-40 UNC, H2 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2907000)
OSG Spiral Flute Tap: M3x0.5 Metric, D3 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2990401)
OSG
OSG Spiral Flute Tap: M3x0.5 Metric, D3 / 4H-6H, 3 Flute, Modified Bottoming Chamfer (MPN 2990401)
General purpose spiral-flute tap with 5/16-18 UNC thread size. Features H3 / 2B-3B tolerance, 3 flutes, and modified bottoming chamfer. Designed for threading blind holes in steel, stainless steel, and aluminum; spiral flute design lifts chips upward to prevent clogging
OSG
General purpose spiral-flute tap with 5/16-18 UNC thread size. Features H3 / 2B-3B tolerance, 3 flutes, and modified bottoming chamfer. Designed for threading blind holes in steel, stainless steel, and aluminum; spiral flute design lifts chips upward to prevent clogging
OSG Spiral Flute Tap: 7/16"-20 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer, TiN Coated High Speed Steel (MPN 1431605)
OSG
OSG Spiral Flute Tap: 7/16"-20 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer, TiN Coated High Speed Steel (MPN 1431605)
OSG Spiral Flute Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 1413505)
OSG
OSG Spiral Flute Tap: #10-32 UNF, H3 / 2B-3B, 3 Flute, Bottoming Chamfer (MPN 1413505)
OSG Spiral Flute Tap: #6-32 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2912408)
OSG
OSG Spiral Flute Tap: #6-32 UNC, H3 / 2B-3B, 3 Flute, Modified Bottoming Chamfer (MPN 2912408)