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OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-9 UNC, H5 / 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, 7/8"-9 UNC, H5 / 2B-3B, 4 Flute

The OSG Screw Thread Insert STI Tap is a spiral-flute tap for steel and stainless steel, specified as 7/8"-9 UNC with an H5 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes (MPN 30205508). 3G Electric…

SKU 3G-OTH-244243

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 7/8"-9 UNC, H5 / 2B-3B, 4 Flute
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
30205508
Type
H5 / 2B-3B, Bottoming Chamfer
Flute
4
UNC
7/8"-9
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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 7/8"-9 UNC with an H5 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes (MPN 30205508). 3G Electric sources this genuine OSG tool across 14 industrial departments, with specialist expertise in combustion, pumps and controls ensuring accurate sourcing and support.

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 before installing screw thread inserts. It is commonly used in automotive, aerospace, and general manufacturing applications where strong, wear-resistant threads are required.

What are the specifications of the OSG 30205508 STI Tap?

The OSG 30205508 is a spiral-flute STI tap with a 7/8"-9 UNC thread size, H5 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is designed for threading holes in steel and stainless steel prior to inserting helical coil thread inserts.

Where to buy the OSG 30205508 STI Tap worldwide?

You can source the OSG 30205508 STI Tap 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 this OSG tap.

How to select the correct STI tap for a 7/8"-9 UNC thread insert?

For a 7/8"-9 UNC thread insert, select an STI tap with the same thread size and pitch, such as the OSG 30205508. Ensure the tap has a bottoming chamfer for blind holes and a spiral-flute design for chip evacuation in steel and stainless steel. Always match the tap tolerance to 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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