OSG Screw Thread Insert STI Tap: Straight Fute, 1/2"-20 UNF, H3 / 2B-3B, 4 Flute
The OSG Screw Thread Insert STI Tap (SKU 1813900, MPN 1813900) is a general-purpose STI tap with a straight flute design, sized 1/2"-20 UNF. It features a bottoming chamfer, 4 flutes, and an H3 / 2B-3B tolerance…
SKU 3G-OTH-262089
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
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Product Description
The OSG Screw Thread Insert STI Tap (SKU 1813900, MPN 1813900) is a general-purpose STI tap with a straight flute design, sized 1/2"-20 UNF. It features a bottoming chamfer, 4 flutes, and an H3 / 2B-3B tolerance class, making it suitable for threading holes for screw thread inserts.
Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
An OSG STI tap cuts internal threads in a workpiece to accept screw thread inserts (helicoils). It is used in metalworking and maintenance applications across industries like automotive, aerospace, and general manufacturing to repair or reinforce stripped threads.
What are the specifications of the OSG 1813900 STI Tap?
The OSG 1813900 is a 1/2"-20 UNF straight flute STI tap with a bottoming chamfer, 4 flutes, and H3 / 2B-3B tolerance. It is designed for general-purpose threading of holes that will receive screw thread inserts.
Where to buy OSG STI taps worldwide?
3G Electric supplies OSG STI taps like the 1813900 to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this and other OSG cutting tools.
How to select the correct STI tap size?
Select an STI tap that matches the thread size and pitch of the insert you plan to install. For a 1/2"-20 UNF insert, use a 1/2"-20 UNF STI tap. The tap's tolerance (e.g., H3) should match the required class of fit for the insert.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG general purpose sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
