OSG Screw Thread Insert STI Tap: Spiral Point, 9/16"-18 UNF, H4 / 2B-3B, 3 Flute
The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for threading holes to accept screw thread inserts. This 9/16"-18 UNF tap features an H4 / 2B-3B tolerance, a plug chamfer, and 3 flutes (MPN 12501200).
SKU 3G-OTH-287021
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 is a spiral-point tap designed for threading holes to accept screw thread inserts. This 9/16"-18 UNF tap features an H4 / 2B-3B tolerance, a plug chamfer, and 3 flutes (MPN 12501200).
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 workpiece before installing a helical coil thread insert. It is commonly applied in aerospace, automotive, and industrial maintenance to repair or reinforce stripped threads in metal components.
What are the specifications of the OSG STI Tap 12501200?
The OSG STI Tap 12501200 is a spiral-point tap with a 9/16"-18 UNF thread, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is designed for through-hole threading and produces threads that accept standard screw thread inserts.
Where to buy OSG STI Tap 12501200 worldwide?
3G Electric supplies the OSG STI Tap 12501200 to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time; we source genuine OSG tooling for industrial applications across 14 departments.
How to select the correct STI tap size for a thread repair?
Select an STI tap that matches the thread size and pitch of the insert you plan to install. For a 9/16"-18 UNF insert, use the OSG 12501200 tap with H4 / 2B-3B tolerance. Always verify the tap's chamfer type (plug for through-holes) and flute count for chip evacuation.
Used in
Common applications for OSGOSG Products
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.
