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OSG Screw Thread Insert STI Tap: Spiral Fute, #4-40 UNC, H2 / 2B-3B - Spiral-Flute STI Taps for Multiple Materials
OSGSpiral-Flute STI Taps for Multiple Materials

OSG Screw Thread Insert STI Tap: Spiral Fute, #4-40 UNC, H2 / 2B-3B

SKU 3G-OTH-281131

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, #4-40 UNC, H2 / 2B-3B
Category
Spiral-Flute STI Taps for Multiple Materials
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Technical Specifications

OSG
Manufacturer Part Number
1715808
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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 multiple materials for installing helical wire thread inserts. It is commonly applied in aerospace, automotive, and general manufacturing to repair or reinforce threaded holes in aluminum, steel, and cast iron.

What are the specifications of the OSG STI Tap #4-40 UNC?

The OSG STI Tap has a #4-40 UNC thread size, H2 / 2B-3B tolerance, spiral flute design, and 2 flutes. It is designed for tapping holes that will accept screw thread inserts. The manufacturer part number is 1715808.

Where to buy OSG STI Taps worldwide?

3G Electric supplies OSG STI Taps worldwide, handling full logistics and customs clearance. As a global industrial sourcing partner, we provide genuine OSG cutting tools like the #4-40 UNC spiral-flute tap to customers across multiple industries.

How to select the correct STI tap size for thread inserts?

Select an STI tap that matches the thread insert's nominal size and pitch, such as #4-40 UNC. The tap must have STI (Screw Thread Insert) designation to cut the oversized hole required for insert installation. Always verify the insert manufacturer's recommended tap drill size.

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 multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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