OSG Spiral Flute Tap: 5/16"-18 UNC, H5 / 2B-3B, 3 Flute
SKU 3G-OTH-218700
Need installation or engineering help?
Ask a question
Frequently Asked Questions
What is the OSG spiral flute tap 5/16"-18 UNC 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 thread quality and tool life are critical.
What are the specifications of the OSG 5/16"-18 UNC spiral flute tap?
The OSG spiral flute tap has a 5/16"-18 UNC thread size, H5 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. The manufacturer part number is 1650502008. It is engineered for threading blind holes in steel and stainless steel, providing reliable chip evacuation and consistent thread formation.
Where to buy OSG spiral flute taps in worldwide?
3G Electric supplies OSG spiral flute taps worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on the OSG 5/16"-18 UNC tap (MPN 1650502008) and other threading tools across 14 industrial departments.
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 5/16"-18 UNC tap. Ensure the tap's tolerance (H5 / 2B-3B) matches your thread class requirement. Use proper cutting fluid and rigid tapping equipment to maximize tool life and thread quality.
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.















