OSG Spiral Flute Tap: 1/2"-20 UNF, H3 / 2B-3B, 3 Flute
SKU 3G-OTH-218629
Need installation or engineering help?
Ask a question
Frequently Asked Questions
What is OSG spiral flute tap 1/2-20 UNF used for?
This OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its modified bottoming chamfer and 3-flute design efficiently evacuate chips upward, making it ideal for automotive, aerospace, and general manufacturing applications where precise internal threads are required.
What are the specifications of OSG tap 1645012203?
The OSG spiral flute tap has a thread size of 1/2-20 UNF, with a H3 / 2B-3B tolerance class. It features 3 flutes and a modified bottoming chamfer. The manufacturer part number is 1645012203. These specs ensure accurate thread fit in steel and stainless steel workpieces.
Where to buy OSG spiral flute taps worldwide?
3G Electric supplies OSG spiral flute taps like the 1/2-20 UNF model to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this and other OSG threading tools.
How to select the right spiral flute tap for steel?
For threading blind holes in steel, choose a spiral flute tap with a modified bottoming chamfer, like this OSG 1/2-20 UNF tap. Ensure the thread class (H3 / 2B-3B) matches your required fit. Use proper cutting fluid and machine speed per OSG recommendations to achieve clean threads and long tool life.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
