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OSG Spiral-Flute STI Tap, 1/2"-13 UNC, H3 / 2B-3B, 3 Flute - Spiral-Flute STI Taps for Multiple Materials
OSGSpiral-Flute STI Taps for Multiple Materials

OSG Spiral-Flute STI Tap, 1/2"-13 UNC, H3 / 2B-3B, 3 Flute

OSG Spiral-Flute STI Taps for Multiple Materials.

SKU 3G-OTH-281170

Brand
OSG
Item
Spiral-Flute STI Tap, 1/2"-13 UNC, H3 / 2B-3B, 3 Flute
Category
Spiral-Flute STI Taps for Multiple Materials
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

OSG
Manufacturer Part Number
31502008

Technical Documents

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OSG Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

OSG Spiral-Flute STI Taps for Multiple Materials.

Frequently Asked Questions

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

An OSG Screw Thread Insert STI Tap cuts internal threads in multiple materials to accept helical wire thread inserts. It is commonly used in aerospace, automotive, and general manufacturing to repair or reinforce tapped holes in aluminum, steel, and cast iron.

What are the specifications of the OSG 31502008 STI Tap?

The OSG 31502008 is a spiral-flute STI tap with thread size 1/2"-13 UNC, 3 flutes, and a thread limit of H3 / 2B-3B. It is designed for tapping holes that will receive screw thread inserts in multiple materials.

Where to buy OSG STI Taps worldwide?

3G Electric supplies OSG STI Taps worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this 1/2"-13 UNC spiral-flute tap, MPN 31502008.

How to select the correct STI tap size for a thread insert?

Select an STI tap that matches the thread size and pitch of the insert, such as 1/2"-13 UNC. The tap's thread limit (e.g., H3 / 2B-3B) must align with the insert's tolerance class. Always refer to the insert manufacturer's drilling and tapping recommendations.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
Spiral-flute STI tap for cutting internal threads in multiple materials to accept screw thread inserts. Features a 1/2"-13 UNC thread size, H3 / 2B-3B tolerance, and 3 flutes. Suitable for applications requiring strong threads in softer base materials
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Spiral-flute STI tap for cutting internal threads in multiple materials to accept screw thread inserts. Features a 1/2"-13 UNC thread size, H3 / 2B-3B tolerance, and 3 flutes. Suitable for applications requiring strong threads in softer base materials
This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept screw thread inserts. The spiral flute geometry aids chip evacuation during tapping. Thread size is 1/2"-13 UNC with H4 / 2B-3B tolerance, and the tap has 3 flutes. Suitable for through-hole tapping in general manufacturing applications
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This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept screw thread inserts. The spiral flute geometry aids chip evacuation during tapping. Thread size is 1/2"-13 UNC with H4 / 2B-3B tolerance, and the tap has 3 flutes. Suitable for through-hole tapping in general manufacturing applications
This spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a 1/2"-13 UNC thread size, H4 / 2B-3B tolerance, and 3 flutes. Suitable for applications requiring thread repair or reinforcement in materials such as aluminum, steel, and cast iron
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This spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a 1/2"-13 UNC thread size, H4 / 2B-3B tolerance, and 3 flutes. Suitable for applications requiring thread repair or reinforcement in materials such as aluminum, steel, and cast iron
This spiral-flute STI tap is designed for cutting internal threads in multiple materials to prepare holes for screw thread inserts. The spiral flute design aids chip evacuation during threading. Thread size: 1/2"-20 UNF, tolerance: H3 / 2B-3B, 3 flutes. Manufacturer part number: 31502208
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This spiral-flute STI tap is designed for cutting internal threads in multiple materials to prepare holes for screw thread inserts. The spiral flute design aids chip evacuation during threading. Thread size: 1/2"-20 UNF, tolerance: H3 / 2B-3B, 3 flutes. Manufacturer part number: 31502208
OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H3 / 2B-3B, 3 Flute (MPN 31502201)
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OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H3 / 2B-3B, 3 Flute (MPN 31502201)
This spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a 1/4"-20 UNC thread size, H3 / 2B-3B tolerance class, and 3 flutes. Typical applications include threading in aluminum, steel, and cast iron for repair or reinforcement of tapped holes
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This spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a 1/4"-20 UNC thread size, H3 / 2B-3B tolerance class, and 3 flutes. Typical applications include threading in aluminum, steel, and cast iron for repair or reinforcement of tapped holes

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Spiral-flute STI tap for cutting internal threads in multiple materials to accept helical wire thread inserts. Features #10-32 UNF thread size, H2 / 2B-3B tolerance, and 3-flute design. Suitable for applications requiring thread repair or reinforcement in aluminum, steel, and cast iron
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