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OSG 31503008 Spiral-Flute STI Tap, 5/8"-18 UNF, H3 / 2B-3B, 4 Flute - Spiral-Flute STI Taps for Multiple Materials
OSGSpiral-Flute STI Taps for Multiple Materials

OSG 31503008 Spiral-Flute STI Tap, 5/8"-18 UNF, H3 / 2B-3B, 4 Flute

OSG Spiral-Flute STI Taps for Multiple Materials.

SKU 3G-OTH-281149

Brand
OSG
Item
31503008 Spiral-Flute STI Tap, 5/8"-18 UNF, H3 / 2B-3B, 4 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
31503008

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 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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Compatible alternatives & equivalents

Cross-referenced by specification & description
This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accommodate screw thread inserts. It features a 3/4"-16 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. Suitable for applications requiring strong, replaceable threads in materials such as aluminum, steel, and cast iron
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This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accommodate screw thread inserts. It features a 3/4"-16 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. Suitable for applications requiring strong, replaceable threads in materials such as aluminum, steel, and cast iron
This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept screw thread inserts. It features a 3/4"-16 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. Suitable for applications requiring thread reinforcement in general manufacturing
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This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept screw thread inserts. It features a 3/4"-16 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. Suitable for applications requiring thread reinforcement in general manufacturing
This spiral-flute STI tap is designed for cutting internal threads in multiple materials prior to installing helical wire thread inserts. With a 3/4"-16 UNF thread size and H4 tolerance, it accommodates 2B or 3B class threads. The 4-flute spiral flute design aids chip evacuation in through-hole and blind-hole applications
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This spiral-flute STI tap is designed for cutting internal threads in multiple materials prior to installing helical wire thread inserts. With a 3/4"-16 UNF thread size and H4 tolerance, it accommodates 2B or 3B class threads. The 4-flute spiral flute design aids chip evacuation in through-hole and blind-hole applications
This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept screw thread inserts. It features a 9/16"-18 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. Suitable for general manufacturing applications requiring strong threads
OSG
This spiral-flute STI tap is designed for cutting internal threads in multiple materials to accept screw thread inserts. It features a 9/16"-18 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. Suitable for general manufacturing applications requiring strong threads
Spiral-flute STI tap for cutting internal threads to accept helical wire thread inserts. Designed for blind-hole threading in multiple materials such as aluminum, steel, and cast iron. Features a 5/8"-18 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes for efficient chip evacuation upward
OSG
Spiral-flute STI tap for cutting internal threads to accept helical wire thread inserts. Designed for blind-hole threading in multiple materials such as aluminum, steel, and cast iron. Features a 5/8"-18 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes for efficient chip evacuation upward
Spiral-flute STI tap for cutting internal threads in multiple materials to accept screw thread inserts. Features a 9/16"-18 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. Suitable for applications requiring strong, replaceable threads in materials such as aluminum, steel, or cast iron
OSG
Spiral-flute STI tap for cutting internal threads in multiple materials to accept screw thread inserts. Features a 9/16"-18 UNF thread size, H3 / 2B-3B tolerance, and 4 flutes. Suitable for applications requiring strong, replaceable threads in materials such as aluminum, steel, or cast iron

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Spiral-flute STI tap for cutting internal threads to accept helical wire thread inserts. Designed for multiple materials including aluminum, steel, and cast iron. Features 3/8"-24 UNF thread, H2 / 2B-3B tolerance, and 3 flutes. Used in applications requiring thread repair or reinforcement
This spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a M6x1 metric thread size, D3 / 4H-6H tolerance class, and 3 flutes. Used in general manufacturing for repairing or reinforcing 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 M6x1 metric thread size, D3 / 4H-6H tolerance class, and 3 flutes. Used in general manufacturing for repairing or reinforcing tapped holes
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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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
This spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a 7/16"-20 UNF thread, H4 / 2B-3B tolerance, and 3 flutes. Suitable for use in aerospace, automotive, and general manufacturing applications
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This spiral-flute STI tap cuts internal threads in multiple materials to accept helical wire thread inserts. It features a 7/16"-20 UNF thread, H4 / 2B-3B tolerance, and 3 flutes. Suitable for use in aerospace, automotive, and general manufacturing applications
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