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OSG Screw Thread Insert STI Tap: Spiral Fute, #3-48 UNC, H2 / 2B-3B, 2 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, #3-48 UNC, H2 / 2B-3B, 2 Flute

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as #3-48 UNC with a H2 / 2B-3B tolerance and bottoming chamfer. It features 2 flutes and is identified by…

SKU 3G-OTH-244401

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, #3-48 UNC, H2 / 2B-3B, 2 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
30200108
Type
#3-48 UNC, H2 / 2B-3B, Bottoming Chamfer
Flute
2
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as #3-48 UNC with a H2 / 2B-3B tolerance and bottoming chamfer. It features 2 flutes and is identified by manufacturer part number 30200108.

Frequently Asked Questions

What is an OSG spiral-flute STI tap used for?

An OSG spiral-flute STI tap is used to cut internal threads in steel and stainless steel for screw thread inserts. It creates threads that accept helical coil inserts, commonly used in aerospace, automotive, and industrial maintenance to repair or strengthen tapped holes.

What are the specifications of the OSG STI tap #3-48 UNC?

The OSG STI tap has a #3-48 UNC thread size, H2 / 2B-3B tolerance, 2-flute design, and bottoming chamfer. It is a spiral-flute tap for steel and stainless steel, with manufacturer part number 30200108. OSG is the OEM brand for this precision threading tool.

Where to buy OSG STI taps in worldwide?

You can source OSG STI 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 the OSG #3-48 UNC spiral-flute tap.

How to select the correct STI tap for a thread repair?

Select an STI tap that matches the insert's thread size and pitch, such as #3-48 UNC. Use a spiral-flute design for steel or stainless steel to evacuate chips. Choose a bottoming chamfer for blind holes. Always verify the tap tolerance (e.g., H2 / 2B-3B) matches the required thread class.

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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