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OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H4 / 2B-3B - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H4 / 2B-3B

SKU 3G-OTH-244220

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H4 / 2B-3B
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
30204208
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

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 applied in aerospace, automotive, and industrial repair to restore stripped threads or strengthen joints in softer materials.

What are the specifications of the OSG 30204208 STI tap?

The OSG 30204208 is a spiral-flute STI tap with thread size 5/8"-18 UNF, ground thread tolerance H4 / 2B-3B, and 4 flutes. It is designed for tapping steel and stainless steel. The manufacturer part number is 30204208.

Where to buy OSG taps in worldwide?

You can source OSG 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 30204208 STI tap.

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

Select an STI tap that matches the thread size and pitch of the insert you plan to use. For steel or stainless steel, choose a spiral-flute design like the OSG 30204208 to clear chips. Verify the tap tolerance (e.g., H4 / 2B-3B) matches the required class of fit for the application.

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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