OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H3 / 2B-3B, 4 Flute
The OSG Screw Thread Insert STI Tap (MPN 0147801) is a spiral-flute tap for steel and stainless steel, sized 1/2"-20 UNF with an H3 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes and is designed for…
SKU 3G-OTH-244306
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The OSG Screw Thread Insert STI Tap (MPN 0147801) is a spiral-flute tap for steel and stainless steel, sized 1/2"-20 UNF with an H3 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes and is designed for threading holes that will accept screw thread inserts.
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 steel and stainless steel for installing helical wire thread inserts. It is commonly applied in aerospace, automotive, and industrial maintenance to repair or reinforce stripped threads without replacing the parent component.
What are the specifications of the OSG STI Tap 1/2"-20 UNF?
This OSG STI Tap has a 1/2"-20 UNF thread size, H3 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is designed for spiral-flute tapping in steel and stainless steel. The manufacturer part number is 0147801.
Where to buy OSG STI Taps worldwide?
3G Electric supplies OSG STI Taps worldwide. As a global industrial sourcing partner, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on this 1/2"-20 UNF spiral-flute tap.
How to select the correct STI tap for thread repair?
Select an STI tap that matches the thread size and pitch of the insert, such as 1/2"-20 UNF. Use a bottoming chamfer for blind holes and a spiral-flute design for steel and stainless steel. Ensure the tap tolerance (e.g., H3 / 2B-3B) aligns with the required thread class.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute sti taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
