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OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H3 / 2B-3B - Spiral-Flute STI Taps for Multiple Materials
OSGSpiral-Flute STI Taps for Multiple Materials

OSG Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H3 / 2B-3B

SKU 3G-OTH-281149

Brand
OSG
Item
Screw Thread Insert STI Tap: Spiral Fute, 5/8"-18 UNF, H3 / 2B-3B
Category
Spiral-Flute STI Taps for Multiple Materials
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Technical Specifications

OSG
Manufacturer Part Number
31503008
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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

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

This OSG spiral-flute STI tap is designed for cutting internal threads in multiple materials before installing screw thread inserts. It is commonly used in automotive, aerospace, and general manufacturing applications where reliable thread reinforcement is required.

What are the specifications of the OSG 31503008 STI tap?

The OSG 31503008 is a spiral-flute STI tap with a 5/8"-18 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. It is designed for multiple materials and is suitable for pre-tapping holes for screw thread inserts.

Where to buy the OSG 31503008 STI tap worldwide?

3G Electric supplies the OSG 31503008 STI tap worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to select the correct STI tap for a UNF thread?

Select an STI tap that matches the thread size and pitch of the insert, such as 5/8"-18 UNF. Ensure the tap tolerance (e.g., H3 / 2B-3B) aligns with the required class of fit. OSG taps are designed for multiple materials, but always verify material compatibility.

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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