OSG Screw Thread Insert STI Tap: Spiral Fute, 9/16"-12 UNC, H3 / 2B-3B, 4 Flute
The OSG Screw Thread Insert STI Tap (MPN 30202908) is a spiral-flute tap for steel and stainless steel, sized 9/16"-12 UNC with an H3 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes and is designed…
SKU 3G-OTH-244263
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Product Description
The OSG Screw Thread Insert STI Tap (MPN 30202908) is a spiral-flute tap for steel and stainless steel, sized 9/16"-12 UNC with an H3 / 2B-3B tolerance and a bottoming chamfer. It features 4 flutes and is designed for threading holes that will accept screw thread inserts. 3G Electric interprets your demand for this precision tool, sources it from OSG, and supports your application with specialist expertise across 14 industrial departments.
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 steel and stainless steel for installing screw thread inserts. It is commonly applied in aerospace, automotive, and heavy equipment manufacturing where strong, wear-resistant threads are required.
What are the specifications of the OSG STI Tap MPN 30202908?
The OSG STI Tap MPN 30202908 has a UNC thread size of 9/16"-12, a tolerance of H3 / 2B-3B, 4 flutes, and a bottoming chamfer. It is a spiral-flute tap designed for threading steel and stainless steel. The H3 / 2B-3B designation ensures precise thread fit for insert installation.
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 Screw Thread Insert STI Tap MPN 30202908.
How to select the correct OSG STI Tap for steel?
To select the correct OSG STI Tap for steel, match the tap's UNC thread size and pitch to your insert requirements. Use a bottoming chamfer for blind holes and a spiral-flute design for chip evacuation in steel and stainless steel. The H3 / 2B-3B tolerance ensures proper thread class for insert installation.
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3G Electric supplies OSG spiral-flute sti taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















