OSG Screw Thread Insert STI Tap: Spiral Point, 1/2"-20 UNF, H4 / 2B-3B, 3 Flute
The OSG Screw Thread Insert STI Tap is a spiral-point tap for aluminum, specified as 1/2"-20 UNF with H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer (MPN 1103601308).
SKU 3G-OTH-250409
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
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Product Description
The OSG Screw Thread Insert STI Tap is a spiral-point tap for aluminum, specified as 1/2"-20 UNF with H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer (MPN 1103601308).
Frequently Asked Questions
What is an OSG spiral-point STI tap used for?
An OSG spiral-point STI tap is used to cut internal threads in aluminum and other non-ferrous materials for screw thread inserts. Its spiral-point design pushes chips forward, making it ideal for through-hole applications in automotive, aerospace, and general manufacturing.
What are the specifications of the OSG 1/2"-20 UNF STI tap?
This OSG STI tap has a 1/2"-20 UNF thread size, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is designed for aluminum and produces threads that accept screw thread inserts. The manufacturer part number is 1103601308.
Where to buy OSG STI taps worldwide?
You can source OSG STI taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this OSG spiral-point tap.
How to select the correct OSG STI tap for aluminum?
Select an OSG STI tap with the correct thread size, such as 1/2"-20 UNF, and a tolerance like H4 / 2B-3B for aluminum. Use a spiral-point design for through holes and a plug chamfer for general threading. Always match the tap to the insert manufacturer's recommendations.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-point sti taps for aluminum. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
