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OSG Screw Thread Insert STI Tap: Spiral Fute, M20x2.5 Metric, D5 / 4H-6H - Spiral-Flute STI Taps for Steel & Stainless Steel
OSGSpiral-Flute STI Taps for Steel & Stainless Steel

OSG Screw Thread Insert STI Tap: Spiral Fute, M20x2.5 Metric, D5 / 4H-6H

SKU 3G-OTH-244364

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, M20x2.5 Metric, D5 / 4H-6H
Category
Spiral-Flute STI Taps for Steel & Stainless Steel
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Technical Specifications

OSG
Manufacturer Part Number
34301308
Type
M20x2.5 Metric, D5 / 4H-6H
Flute
4
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

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 commonly applied in aerospace, automotive, and heavy equipment manufacturing where thread repair or reinforcement is required.

What are the specifications of the OSG STI Tap M20x2.5?

This OSG STI Tap has a metric M20x2.5 thread size, D5 / 4H-6H tolerance, 4 spiral flutes, and is designed for steel and stainless steel. The manufacturer part number is 34301308. It is a spiral-flute tap optimized for chip evacuation in blind-hole applications.

Where to buy OSG STI Taps worldwide?

3G Electric supplies OSG STI Taps worldwide, handling full logistics and customs clearance for global delivery. As a sourcing specialist across 14 industrial departments, we provide genuine OSG cutting tools with technical support for thread insert tapping applications.

How to select the correct STI tap for thread inserts?

Select an STI tap with the same thread size and pitch as the insert, such as M20x2.5. Use a tap with D5 / 4H-6H tolerance for standard fit. For steel and stainless steel, choose spiral-flute taps like this OSG model to clear chips effectively in blind holes.

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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