OSG Spiral Point Tap: 1/4"-28 UNF, H4 / 2B-3B, 3 Flute
SKU 3G-OTH-214604
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Frequently Asked Questions
What is an OSG spiral point tap used for?
An OSG spiral point tap is used for through-hole threading in metals and alloys. Its spiral point design pushes chips forward, preventing clogging and ensuring clean threads. It is ideal for high-speed production tapping in automotive, aerospace, and general manufacturing applications.
What are the specifications of the OSG 1/4"-28 UNF spiral point tap?
This OSG tap has a 1/4"-28 UNF thread size, H4 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is designed for general purpose through-hole tapping. The H4 limit ensures precise thread fit for 2B-3B class threads in materials like steel and aluminum.
Where to buy OSG taps in worldwide?
3G Electric supplies OSG taps worldwide, handling full logistics and customs clearance. As a global industrial solutions provider, we source genuine OSG cutting tools like the 1/4"-28 UNF spiral point tap and deliver to your facility. Contact us for pricing and lead time.
How to select the right OSG tap for through-hole threading?
For through-hole threading, choose a spiral point tap like this OSG 1/4"-28 UNF model. Match the thread size, pitch, and tolerance class (H4 / 2B-3B) to your application. Consider material hardness and tap coating for extended tool life. Consult OSG's technical data for optimal speeds and feeds.
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3G Electric supplies OSG general purpose spiral-point taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















