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OSG Spiral Flute Tap: #12-28 UNF, H3 / 2B-3B, 3 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: #12-28 UNF, H3 / 2B-3B, 3 Flute

The OSG Spiral Flute Tap (#12-28 UNF, MPN 1749801) is a spiral-flute tap for steel and stainless steel, featuring an H3 / 2B-3B tolerance with a modified bottoming chamfer and 3 flutes. 3G Electric interprets demand…

SKU 3G-OTH-218779

Brand
OSG
Item
Spiral Flute Tap: #12-28 UNF, H3 / 2B-3B, 3 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
1749801
Type
H3 / 2B-3B, Modified Bottoming Chamfer
Flute
3
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Spiral Flute Tap (#12-28 UNF, MPN 1749801) is a spiral-flute tap for steel and stainless steel, featuring an H3 / 2B-3B tolerance with a modified bottoming chamfer and 3 flutes. 3G Electric interprets demand and delivers this genuine industrial tap across 14 departments — and far more — with specialist depth in combustion, pumps and controls as a trust anchor.

Frequently Asked Questions

What is the OSG spiral flute tap #12-28 UNF used for?

The OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging. The modified bottoming chamfer allows threading close to the bottom of the hole. It is commonly used in automotive, aerospace, and general manufacturing applications.

What are the specifications of the OSG tap MPN 1749801?

The OSG tap MPN 1749801 is a #12-28 UNF spiral flute tap with a H3 / 2B-3B tolerance class. It has 3 flutes and a modified bottoming chamfer. This tap is designed for threading blind holes in steel and stainless steel, providing efficient chip evacuation and precise thread formation.

Where to buy OSG taps in worldwide?

You can source OSG taps 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 on the OSG spiral flute tap MPN 1749801. We supply genuine OSG cutting tools for industrial applications.

How to select the correct OSG tap for stainless steel?

For stainless steel, select a spiral flute tap with a modified bottoming chamfer, like the OSG #12-28 UNF. Ensure the tap has a H3 / 2B-3B tolerance for proper thread fit. Use appropriate cutting fluid and reduce speed compared to steel. OSG taps are engineered for chip evacuation and extended tool life in tough 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 spiral-flute taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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