OSG Screw Thread Insert STI Tap: Spiral Fute, M8x1.25 Metric, D3 / 4H-6H
The OSG Screw Thread Insert STI Tap is a spiral-flute tap for multiple materials, with an M8x1.25 Metric thread size and a D3 / 4H-6H tolerance class. It features 3 flutes and is identified by manufacturer part…
SKU 3G-OTH-281066
Need installation or engineering help?
Ask a question
Product Description
The OSG Screw Thread Insert STI Tap is a spiral-flute tap for multiple materials, with an M8x1.25 Metric thread size and a D3 / 4H-6H tolerance class. It features 3 flutes and is identified by manufacturer part number 34500701.
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 multiple materials before installing a helical wire thread insert. It is commonly applied in automotive, aerospace, and general manufacturing to repair or reinforce threaded holes in softer metals like aluminum or cast iron.
What are the specifications of the OSG STI Tap M8x1.25?
The OSG STI Tap has a metric M8x1.25 thread size with a D3 / 4H-6H tolerance class. It features a spiral flute design with 3 flutes, suitable for through-hole threading in multiple materials. The manufacturer part number is 34500701, and it is designed for use with screw thread inserts.
Where to buy OSG STI Tap M8x1.25 worldwide?
You can source the OSG STI Tap M8x1.25 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; we supply genuine OSG cutting tools for industrial applications.
How to select the correct OSG STI tap for thread inserts?
To select the correct OSG STI tap, match the tap thread size and pitch to the insert's internal thread requirement. For M8x1.25 inserts, use an STI tap with D3 / 4H-6H tolerance. Ensure the tap flute type suits your material—spiral flute for through holes. Always refer to OSG's technical data for material-specific speeds and feeds.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute sti taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















