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OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap (MPN 30202901) is a spiral-flute tap designed for steel and stainless steel, sized at 9/16"-12 UNC with an H3 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes for…

SKU 3G-OTH-244303

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
30202901
Type
H3 / 2B-3B, Bottoming Chamfer
Flute
4
UNC
9/16"-12
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap (MPN 30202901) is a spiral-flute tap designed for steel and stainless steel, sized at 9/16"-12 UNC with an H3 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes for efficient chip evacuation in thread insert applications.

Frequently Asked Questions

What is the OSG Screw Thread Insert STI Tap used for?

This OSG spiral-flute STI tap is designed for cutting internal threads in steel and stainless steel to accept screw thread inserts. It is commonly used in automotive, aerospace, and general manufacturing for repairing or reinforcing threaded holes in high-strength materials.

What are the specifications of the OSG STI Tap 30202901?

The OSG STI tap has a UNC thread size of 9/16"-12, a thread class of H3 / 2B-3B, a bottoming chamfer, and 4 spiral flutes. It is designed for steel and stainless steel applications. The manufacturer part number is 30202901.

Where to buy OSG STI Tap 30202901 worldwide?

You can source the OSG STI Tap 30202901 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.

How to select the correct OSG STI tap for a repair job?

Select an STI tap that matches the thread size and pitch of the insert you plan to install. For steel or stainless steel, use a spiral-flute tap like this OSG model with a bottoming chamfer for blind holes. Ensure the thread class (H3 / 2B-3B) aligns with your tolerance 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 spiral-flute sti 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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