OSG Spiral Point Tap: 1/2"-20 UNF, H11 / 2B, 3 Flute, Plug Chamfer (MPN 2842900)
SKU 3G-OTH-251165
Need installation or engineering help?
Ask a question
Frequently Asked Questions
What is the OSG spiral point tap 1/2"-20 UNF used for?
This OSG spiral point tap is designed for through-hole threading in steel, stainless steel, and non-ferrous materials. Its 3-flute design pushes chips forward, reducing clogging and breakage. It is commonly used in automotive, aerospace, and general machining applications requiring precise UNF threads.
What are the specifications of the OSG 2842900 tap?
The OSG 2842900 is a spiral point tap with thread size 1/2"-20 UNF, H11 / 2B tolerance, 3 flutes, and plug chamfer. It is an oversized tap for producing threads at the high end of the 2B class fit. The manufacturer part number is 2842900.
Where to buy OSG taps like 2842900 worldwide?
3G Electric supplies OSG taps including the 2842900 model to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this oversized spiral point tap for UNF threading applications.
How to select the correct OSG tap for UNF threads?
Select an OSG tap based on thread size (e.g., 1/2"-20 UNF), tolerance class (H11 for 2B fit), chamfer type (plug for through holes), and material. For oversized threads, use an H11 tap. Always match the tap to the hole type—spiral point for through holes, spiral flute for blind holes.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG oversized spiral-point taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















