OSG Screw Thread Insert STI Tap: Straight Fute, 7/8"-9 UNC, H3 / 2B-3B, 4 Flute

An OSG Screw Thread Insert STI Tap is used to cut internal threads in pre-drilled holes before installing helical wire thread inserts. It is commonly applied in automotive, aerospace, and general manufacturing to repair or reinforce threads in softer materials like aluminum or cast iron.

The OSG STI Tap 12603900 is a straight flute, general-purpose tap with a 7/8"-9 UNC thread size, H3 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It is designed for use with screw thread inserts and is made by OSG, a leading cutting tool manufacturer.

You can source the OSG STI Tap 12603900 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring you receive the correct tool for your thread repair or insert installation application.

To select the correct OSG STI Tap, match the tap's thread size and pitch to the insert's specifications. For the 12603900 model, use it for 7/8"-9 UNC inserts. Ensure the tap tolerance (H3 / 2B-3B) aligns with your required thread class. Always verify the insert manufacturer's recommendations for optimal results.