OSG Screw Thread Insert STI Tap: Spiral Fute, 1/2"-20 UNF, H4 / 2B-3B, 4 Flute
The OSG Screw Thread Insert STI Tap (MPN 0147901) is a spiral-flute tap for steel and stainless steel, sized 1/2"-20 UNF with an H4 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes and is designed for…
SKU 3G-OTH-244187
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 (MPN 0147901) is a spiral-flute tap for steel and stainless steel, sized 1/2"-20 UNF with an H4 / 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 spiral-flute STI tap used for?
An OSG spiral-flute STI tap is used to cut internal threads in steel and stainless steel for screw thread inserts. It is designed for bottoming chamfer applications, producing threads to H4 / 2B-3B tolerance classes. This tap is ideal for repair or reinforcement work in industrial equipment.
What are the specifications of the OSG 0147901 STI tap?
The OSG 0147901 STI tap has a 1/2"-20 UNF thread size, spiral flute design, 4 flutes, and a bottoming chamfer. It is rated H4 / 2B-3B tolerance for screw thread insert applications. This tap is designed for use in steel and stainless steel materials.
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 the OSG 0147901 spiral-flute STI tap.
How to select the correct OSG STI tap for steel?
To select the correct OSG STI tap for steel, match the thread size (e.g., 1/2"-20 UNF) and tolerance class (H4 / 2B-3B) to your insert requirements. Use a spiral-flute design for chip evacuation in blind holes. Ensure the tap is rated for steel and stainless steel materials.
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.
