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 0148301) is a spiral-flute tap designed for steel and stainless steel, with a 7/8"-14 UNF thread size. It features an H4 / 2B-3B tolerance, bottoming chamfer, and 4 flutes…
SKU 3G-OTH-244414
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 0148301) is a spiral-flute tap designed for steel and stainless steel, with a 7/8"-14 UNF thread size. It features an H4 / 2B-3B tolerance, bottoming chamfer, and 4 flutes, enabling threading for screw thread inserts in demanding materials.
Frequently Asked Questions
What is the OSG 0148301 STI tap used for?
The OSG 0148301 is a spiral-flute STI tap designed for threading holes in steel and stainless steel before installing screw thread inserts. Its bottoming chamfer allows threading close to the bottom of blind holes, making it ideal for repair and production work in automotive, aerospace, and general manufacturing.
What are the specifications of the OSG 0148301 STI tap?
This OSG tap has a thread size of 7/8"-14 UNF, with a ground thread tolerance of H4 for the tap and 2B-3B for the mating insert thread. It features 4 flutes, a spiral-flute design for chip evacuation, and a bottoming chamfer. The manufacturer part number is 0148301.
Where to buy OSG taps in worldwide?
3G Electric supplies OSG taps like the 0148301 to customers worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver OSG cutting tools to any country.
How to select the correct STI tap for a thread insert?
Select an STI tap that matches the insert's thread size and class. For a 7/8"-14 UNF insert requiring a 2B-3B fit, use a tap with H4 tolerance like this OSG model. Ensure the tap has the correct chamfer type—bottoming for blind holes, plug for through holes—and consider material-specific coatings for steel or stainless steel.
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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.
