OSG Spiral-Point STI Tap, 7/8"-9 UNC, H3 / 2B-3B, Plug Chamfer, 3 Flute
The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for threading holes to accept screw thread inserts. This 7/8"-9 UNC tap features an H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer (MPN 12502100).
SKU 3G-OTH-287034
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
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Product Description
The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for threading holes to accept screw thread inserts. This 7/8"-9 UNC tap features an H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer (MPN 12502100).
Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
An OSG Screw Thread Insert STI Tap is used to cut internal threads in a pre-drilled hole before installing a helical wire thread insert. It is commonly applied in automotive, aerospace, and general manufacturing to repair or reinforce threads in aluminum, cast iron, and steel components.
What are the specifications of the OSG STI Tap 12502100?
The OSG STI Tap 12502100 has a thread size of 7/8"-9 UNC, a spiral-point design, 3 flutes, and a plug chamfer. It is ground to H3 tolerance for producing 2B-3B class threads. This tap is designed for through-hole threading and is made from high-speed steel for durability.
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 12502100 or other OSG threading tools.
How to select the correct OSG STI Tap for a thread repair?
To select the correct OSG STI Tap, match the tap thread size and pitch to the thread insert you plan to use. For a 7/8"-9 UNC insert, choose the OSG 12502100 with H3 tolerance for 2B-3B class threads. Ensure the tap chamfer type (plug) suits your hole depth and material.
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3G Electric supplies OSG spiral-point sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
