OSG Spiral Flute Tap: 5/8"-11 UNC, H3 / 2B-3B, 3 Flute
The OSG Spiral Flute Tap (5/8"-11 UNC, MPN 1645058113) is a 3-flute, modified bottoming chamfer tap with H3 / 2B-3B tolerance, designed for threading steel and stainless steel. 3G Electric interprets your demand…
SKU 3G-OTH-217898
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Product Description
The OSG Spiral Flute Tap (5/8"-11 UNC, MPN 1645058113) is a 3-flute, modified bottoming chamfer tap with H3 / 2B-3B tolerance, designed for threading steel and stainless steel. 3G Electric interprets your demand, sources this genuine OSG tap, and provides a quote with expert support across 14 industrial departments — with specialist depth in combustion, pumps, and controls as an authorised distributor.
Frequently Asked Questions
What is the OSG spiral flute tap 5/8"-11 UNC used for?
The OSG spiral flute tap is designed for threading blind holes in steel and stainless steel. Its spiral flute design lifts chips upward, preventing clogging in deep or blind-hole applications. It is commonly used in automotive, aerospace, and general manufacturing for creating internal UNC threads.
What are the specifications of the OSG spiral flute tap 5/8"-11 UNC?
This OSG tap has a 5/8"-11 UNC thread size, H3 / 2B-3B tolerance, 3 flutes, and a modified bottoming chamfer. The H3 ground thread limit ensures precise fit for 2B or 3B class threads. It is designed for steel and stainless steel workpieces.
Where to buy the OSG spiral flute tap 5/8"-11 UNC worldwide?
You can source the OSG spiral flute tap 5/8"-11 UNC from 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.
How to select the correct OSG spiral flute tap for steel?
Select an OSG spiral flute tap based on thread size (e.g., 5/8"-11 UNC), material (steel or stainless steel), and hole type (blind or through). For blind holes, use a spiral flute tap with a modified bottoming chamfer. Ensure the tap tolerance (H3) matches the required thread class (2B or 3B).
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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.















