OSG Screw Thread Insert STI Tap: Straight Fute, #4-40 UNC, H1 / 2B-3B, 3 Flute
The OSG Screw Thread Insert STI Tap (Straight Flute) is a general-purpose STI tap for #4-40 UNC threads, featuring a bottoming chamfer and 3 flutes. It is ground to H1 / 2B-3B tolerance class (MPN 6004600).
SKU 3G-OTH-262107
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.
Need installation or engineering help?
Ask a question
Product Description
The OSG Screw Thread Insert STI Tap (Straight Flute) is a general-purpose STI tap for #4-40 UNC threads, featuring a bottoming chamfer and 3 flutes. It is ground to H1 / 2B-3B tolerance class (MPN 6004600).
Frequently Asked Questions
What is an OSG Screw Thread Insert STI Tap used for?
An OSG STI tap cuts internal threads in pre-drilled holes to accept helical screw thread inserts. It is used in aerospace, automotive, and general manufacturing to repair or reinforce threads in aluminum, steel, and cast iron. The #4-40 UNC size suits small fasteners in precision assemblies.
What are the specifications of the OSG STI Tap #4-40 UNC?
This OSG tap is #4-40 UNC with a bottoming chamfer, 3 flutes, and H1 / 2B-3B tolerance. It is designed for screw thread insert installation. The straight flute design provides chip clearance in through or blind holes. Manufacturer part number is 6004600.
Where to buy OSG STI Taps worldwide?
3G Electric supplies OSG STI Taps worldwide. We source genuine OSG cutting tools and handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the #4-40 UNC bottoming tap (MPN 6004600).
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 #4-40 UNC. The tap must have STI (screw thread insert) marking and the correct chamfer type—bottoming for blind holes, plug for through holes. Always verify the insert manufacturer's recommended drill and tap specs.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG general purpose sti taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
