OSG Screw Thread Insert STI Tap: Spiral Fute, 1/4"-28 UNF, H3 / 2B-3B, 3 Flute
The OSG Screw Thread Insert STI Tap is a spiral-flute tap designed for threading holes to accept screw thread inserts. This specific model, MPN 8012100, features a 1/4"-28 UNF thread size, H3 / 2B-3B tolerance class…
SKU 3G-OTH-273378
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The OSG Screw Thread Insert STI Tap is a spiral-flute tap designed for threading holes to accept screw thread inserts. This specific model, MPN 8012100, features a 1/4"-28 UNF thread size, H3 / 2B-3B tolerance class, a bottoming chamfer, and three flutes.
Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
An OSG Screw Thread Insert STI Tap cuts internal threads in metal to accept helical wire thread inserts. It is used in aerospace, automotive, and general manufacturing to repair or reinforce stripped threads in aluminum, steel, and cast iron components.
What are the specifications of the OSG 8012100 STI Tap?
The OSG 8012100 is a spiral-flute STI tap with 1/4"-28 UNF thread, H3 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. It is designed for through-hole or blind-hole thread repair where chip evacuation is critical.
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. Contact us for pricing and lead time on the OSG 8012100 or other thread repair tooling.
How to select the correct STI tap size for a thread insert?
Select an STI tap marked with the same thread size and pitch as the insert, e.g., 1/4"-28 UNF. Use a bottoming chamfer for blind holes and a plug or taper chamfer for through holes. Always match the tap tolerance (H3) to the insert class.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
