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OSG Spiral Flute Tap: #4-40 UNC, H5 / 2B, 3 Flute, Modified Bottoming Chamfer (MPN 2916608) - General Purpose Spiral-Flute Taps
OSGGeneral Purpose Spiral-Flute Taps

OSG Spiral Flute Tap: #4-40 UNC, H5 / 2B, 3 Flute, Modified Bottoming Chamfer (MPN 2916608)

OSG General Purpose Spiral-Flute Taps.

SKU 3G-OTH-231223

Brand
OSG
Item
Spiral Flute Tap: #4-40 UNC, H5 / 2B, 3 Flute, Modified Bottoming Chamfer
Category
General Purpose Spiral-Flute Taps
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Technical Specifications

OSG
Manufacturer Part Number
2916608

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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 in deep or blind holes. Common applications include automotive, aerospace, and general manufacturing where precise internal threads are required.

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

This OSG tap has a #4-40 UNC thread size, H5 tolerance for 2B class fit, 3 flutes, and a modified bottoming chamfer. The manufacturer part number is 2916608. It is a general purpose spiral-flute tap suitable for blind hole threading in a range of materials.

Where to buy OSG spiral flute taps in worldwide?

You can source OSG spiral flute taps 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 times on this and other OSG cutting tools.

How to select the right OSG tap for blind holes?

For blind holes, choose a spiral flute tap like this OSG #4-40 UNC model, which pushes chips out of the hole. Ensure the chamfer type matches your thread depth: a modified bottoming chamfer allows threading close to the hole bottom. Always match tap tolerance (H5) to the required thread class (2B).

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: #4-40 UNC, H5 / 2B, 3 Flute, Modified Bottoming Chamfer (MPN 2916600)
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OSG Spiral Flute Tap: #4-40 UNC, H5 / 2B, 3 Flute, Modified Bottoming Chamfer (MPN 2916600)
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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 aluminum
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This spiral-flute tap is designed for threading blind holes in ferrous and non-ferrous materials. The spiral flute geometry evacuates chips upward, preventing clogging and ensuring clean threads. It features a 2"-4.5 UNC thread size, 2B class of fit, 5 flutes, and a modified bottoming chamfer
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