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OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute - Spiral-Flute Taps for Steel & Stainless Steel
OSGSpiral-Flute Taps for Steel & Stainless Steel

OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute

SKU 3G-OTH-217871

Brand
OSG
Item
Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute
Category
Spiral-Flute Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
0138808
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is the OSG spiral flute tap 1/2-20 UNF used for?

This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its spiral flute design evacuates chips upward, preventing clogging, making it ideal for automotive, aerospace, and general manufacturing applications requiring precise internal threads.

What are the specifications of the OSG spiral flute tap 0138808?

The OSG spiral flute tap has a thread size of 1/2-20 UNF, with a H3 / 2B-3B tolerance class. It features 3 flutes and a bottoming chamfer, designed for threading blind holes in steel and stainless steel. The manufacturer part number is 0138808.

Where to buy OSG spiral flute taps 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 time on this OSG tap.

How to select the correct OSG spiral flute tap for steel?

Select an OSG spiral flute tap based on thread size, pitch, and material. For steel and stainless steel, use a tap with H3 / 2B-3B tolerance for precise fit. Ensure the chamfer type matches your hole—bottoming for blind holes. Always match the tap to the material hardness.

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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