OSG Extension Tap: #4-40 UNC, H2 / 2B-3B, 3 Flute
SKU 3G-OTH-315318
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Frequently Asked Questions
What is OSG extension tap #4-40 UNC used for?
This OSG extension tap is designed for threading blind holes in steel and stainless steel. Its spiral-flute design evacuates chips upward, while the bottoming chamfer allows threading close to the hole bottom. It is commonly used in automotive, aerospace, and general machining applications.
What are the specifications of OSG extension tap #4-40 UNC?
This OSG extension tap has a #4-40 UNC thread size, H2 / 2B-3B tolerance, 3 flutes, and a bottoming chamfer. The manufacturer part number is 0143701. It is a spiral-flute extension tap designed for steel and stainless steel, enabling deep or hard-to-reach hole threading.
Where to buy OSG extension tap #4-40 UNC worldwide?
3G Electric supplies and delivers OSG extension taps worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to ensure reliable delivery. Contact us for availability and lead time on this OSG #4-40 UNC extension tap.
How to select the correct OSG extension tap for steel?
For steel threading, choose an OSG extension tap with spiral flutes for chip evacuation and a bottoming chamfer for blind holes. Verify thread size (e.g., #4-40 UNC), tolerance class (H2 / 2B-3B), and material compatibility. Always match the tap to the hole depth and machine capability.
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Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute extension taps for steel & stainless steel. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
