OSG Spiral Flute Tap: #4-48 UNF, H2 / 2B-3B, 3 Flute
SKU 3G-OTH-218680
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Frequently Asked Questions
What is the OSG spiral flute tap #4-48 UNF used for?
This OSG spiral flute tap is designed for threading steel and stainless steel. The #4-48 UNF size and bottoming chamfer make it suitable for through-hole or blind-hole applications where threads must reach the bottom of the hole.
What are the specifications of the OSG 0135801 tap?
The OSG 0135801 is a #4-48 UNF spiral flute tap with a H2 / 2B-3B tolerance class. It has 3 flutes and a bottoming chamfer, designed for threading steel and stainless steel. The H2 limit ensures precise thread fit for 2B-3B class threads.
Where to buy OSG taps in worldwide?
You can source the OSG 0135801 tap through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide locations, ensuring you receive the correct threading tool for your application.
How to select the correct OSG tap for stainless steel?
For stainless steel, choose a spiral flute tap like the OSG #4-48 UNF with a bottoming chamfer for blind holes. Ensure the tap has a H2 tolerance for 2B-3B thread classes. Use proper cutting fluid and rigid tapping techniques to prevent work hardening.
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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.















