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OSG Spiral-Flute STI Tap, 7/8"-9 UNC, H5 Tolerance, 4 Flutes - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

OSG Spiral-Flute STI Tap, 7/8"-9 UNC, H5 Tolerance, 4 Flutes

OSG Spiral-Flute STI Taps for Steel & Stainless Steel.

SKU 3G-OTH-244230

Brand
OSG
Item
Spiral-Flute STI Tap, 7/8"-9 UNC, H5 Tolerance, 4 Flutes
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OSG
Manufacturer Part Number
30205401

Technical Documents

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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

OSG Spiral-Flute STI Taps for Steel & Stainless Steel.

Frequently Asked Questions

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

An OSG Screw Thread Insert STI Tap is used to cut internal threads in steel and stainless steel for installing helical wire thread inserts. It is ideal for repairing or reinforcing threads in industrial applications like machining, automotive, and heavy equipment maintenance.

What are the specifications of the OSG STI Tap 30205401?

The OSG STI Tap 30205401 is a spiral-flute tap with a 7/8"-9 UNC thread size, H5 tolerance for 2B-3B class fit, and 4 flutes. It is designed for threading holes that will accept screw thread inserts in steel and stainless steel materials.

Where to buy OSG STI Tap 30205401 worldwide?

You can source the OSG STI Tap 30205401 from 3G Electric, which handles full logistics, customs clearance, and delivery to worldwide destinations. As a global industrial supplier, we provide genuine OSG taps for demanding machining applications.

How to select the correct STI tap size for a thread insert?

To select the correct STI tap, match the tap's thread size and pitch to the insert's specifications. For example, the OSG 30205401 is a 7/8"-9 UNC tap for inserts requiring that thread. Always verify the insert manufacturer's recommended tap size and tolerance 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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Cross-referenced by specification & description
Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. Thread size 7/8"-9 UNC, ground to H5 tolerance for 2B-3B class fit, with 4 flutes. Suitable for applications requiring strong threads in softer base materials
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Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accept screw thread inserts. Thread size 3/4"-10 UNC with H5 tolerance for 2B-3B class fit. 4-flute design aids chip evacuation. Used in applications requiring strong, wear-resistant threads
This OSG spiral-flute STI tap is designed for cutting internal threads in steel and stainless steel before installing screw thread inserts. It features a 3/4"-10 UNC thread size with H5 tolerance for 2B-3B class fit and a 4-flute spiral flute design
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This OSG spiral-flute STI tap is designed for cutting internal threads in steel and stainless steel before installing screw thread inserts. It features a 3/4"-10 UNC thread size with H5 tolerance for 2B-3B class fit and a 4-flute spiral flute design
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Spiral-flute STI tap for cutting internal threads in steel and stainless steel to accommodate helical wire thread inserts. Thread size 7/8"-9 UNC with H3 / 2B-3B tolerance class. Four-flute design aids chip evacuation. Manufacturer part number 30205201
This OSG spiral-flute STI tap cuts internal threads in steel and stainless steel for installing helical wire thread inserts. It features a thread size of 7/8"-9 UNC, 4 flutes, and a ground thread tolerance of H3 / 2B-3B. Commonly used in applications where stripped threads must be restored to original strength without replacing the component
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This OSG spiral-flute STI tap cuts internal threads in steel and stainless steel for installing helical wire thread inserts. It features a thread size of 7/8"-9 UNC, 4 flutes, and a ground thread tolerance of H3 / 2B-3B. Commonly used in applications where stripped threads must be restored to original strength without replacing the component
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Spiral-flute STI tap for cutting internal threads in steel and stainless steel. UNC thread size 7/8"-9, tolerance H5 / 2B-3B, 4 flutes, bottoming chamfer for blind holes. Used to prepare holes for screw thread inserts

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