OSG Screw Thread Insert STI Tap: Spiral Point, 1"-8 UNC, H4 / 2B, 4 Flute
The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for 1"-8 UNC threads, featuring H4 / 2B tolerance, 4 flutes, and a plug chamfer (MPN 12502500). 3G Electric sources this genuine OSG tool as part of…
SKU 3G-OTH-286994
Local availability & support — the Philippines
- Delivery
- 5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
- Payment
- Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
- Ships to
- Manila, Quezon City, Cebu, Davao, Batangas
Need installation or engineering help?
Ask a question
Product Description
The OSG Screw Thread Insert STI Tap is a spiral-point tap designed for 1"-8 UNC threads, featuring H4 / 2B tolerance, 4 flutes, and a plug chamfer (MPN 12502500). 3G Electric sources this genuine OSG tool as part of our industrial supply across 14 departments, with specialist expertise in combustion, pumps, and controls ensuring accurate sourcing and support.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
An OSG STI tap cuts internal threads in a workpiece to accept a helical wire thread insert, restoring or strengthening threads in soft materials like aluminum or cast iron. It is commonly used in automotive, aerospace, and general manufacturing repair applications.
What are the specifications of the OSG 12502500 STI Tap?
The OSG 12502500 is a spiral-point STI tap with a 1"-8 UNC thread, H4 / 2B tolerance, 4 flutes, and a plug chamfer. It is designed for through-hole threading and produces a 2B class fit for standard thread insert installation.
Where to buy OSG STI taps in worldwide?
3G Electric supplies OSG STI taps like the 12502500 to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time on this spiral-point tap.
How to select the correct STI tap size for a thread insert?
Select an STI tap that matches the thread insert's nominal size and pitch, such as 1"-8 UNC. The tap must be marked "STI" and have the correct tolerance (e.g., H4 / 2B) to produce threads that accept the insert. Always verify the insert manufacturer's recommended tap specifications.
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.
