OSG Spiral Point Tap: 1/4"-20 UNC, 2B+, 2 Flute, Plug Chamfer
The OSG Spiral Point Tap (1/4"-20 UNC, MPN 1590008) is an oversized spiral-point tap with a 2B+ tolerance, 2-flute design, plug chamfer, and TiCN-coated high-speed steel construction. 3G Electric interprets this…
SKU 3G-OTH-251153
Need installation or engineering help?
Ask a question
Product Description
The OSG Spiral Point Tap (1/4"-20 UNC, MPN 1590008) is an oversized spiral-point tap with a 2B+ tolerance, 2-flute design, plug chamfer, and TiCN-coated high-speed steel construction. 3G Electric interprets this demand and delivers the exact OEM-specified tool, backed by our specialist expertise in sourcing across 14 industrial departments — and far more — with trusted depth in cutting tools and controls.
Frequently Asked Questions
What is the OSG spiral point tap 1/4-20 UNC used for?
The OSG spiral point tap is used for threading through holes in metal, particularly in production environments. Its spiral point design pushes chips forward, preventing clogging. The TiCN coating extends tool life on steel and cast iron. The 2B+ oversized tolerance allows for controlled thread fit in applications requiring plating or coating.
What are the specifications of the OSG 1590008 tap?
The OSG 1590008 is a 1/4-20 UNC spiral point tap with a 2B+ thread class, 2 flutes, and a plug chamfer. It is made of TiCN coated high speed steel. The oversized 2B+ tolerance provides additional clearance for post-plating thread fit. It is designed for through-hole threading in ferrous materials.
Where to buy OSG taps in worldwide?
3G Electric supplies OSG taps worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the OSG 1590008 spiral point tap. We source and deliver to any country.
How to select the correct OSG tap for a threading application?
Select an OSG tap based on material, hole type, and thread fit. For through holes, use a spiral point tap like the 1590008. Choose TiCN coating for steel or cast iron. The 2B+ oversized class is ideal when threads require post-plating. Match tap size to the hole diameter and thread pitch (1/4-20 UNC).
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.















