OSG Screw Thread Insert STI Tap: Spiral Fute, 7/8"-14 UNF, H4 / 2B-3B, 4 Flute
The OSG Screw Thread Insert STI Tap (MPN 0148308) is a spiral-flute tap for steel and stainless steel, sized 7/8"-14 UNF with a bottoming chamfer. It features an H4 / 2B-3B tolerance class and 4 flutes, designed for…
SKU 3G-OTH-244260
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 0148308) is a spiral-flute tap for steel and stainless steel, sized 7/8"-14 UNF with a bottoming chamfer. It features an H4 / 2B-3B tolerance class and 4 flutes, designed for threading holes to accept screw thread inserts.
Frequently Asked Questions
What is an OSG spiral-flute STI tap used for?
An OSG spiral-flute STI tap cuts internal threads in steel and stainless steel for screw thread inserts. It is used in aerospace, automotive, and industrial maintenance to restore or reinforce threaded holes. The spiral-flute design evacuates chips upward, making it ideal for blind-hole applications.
What are the specifications of the OSG STI tap 0148308?
The OSG STI tap 0148308 has a UNF thread size of 7/8"-14, H4 / 2B-3B tolerance, 4 flutes, and a bottoming chamfer. It is designed for screw thread inserts in steel and stainless steel. The H4 tolerance ensures precise thread fit for insert installation.
Where to buy OSG STI taps worldwide?
3G Electric supplies OSG STI taps worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine OSG cutting tools and support procurement teams with technical guidance on thread insert tapping applications.
How to select the correct STI tap for a thread repair?
Select an STI tap that matches the original thread size and pitch, such as 7/8"-14 UNF. Use a bottoming chamfer for blind holes and a spiral-flute design for chip evacuation in steel. Verify the tap tolerance (e.g., H4) matches the insert class. OSG taps are a reliable choice for consistent results.
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.
