OSG 7/8"-9 UNC Spiral-Point Extension Tap
The OSG Extension Tap (7/8"-9 UNC, MPN 1653505308) is a spiral-point extension tap for multiple materials, featuring a H6 / 2B-3B tolerance, plug chamfer, V coated powdered metal construction, and 3 flutes. 3G…
SKU 3G-OTH-402459
Local availability & support
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
Need installation or engineering help?
Ask a question
Product Description
The OSG Extension Tap (7/8"-9 UNC, MPN 1653505308) is a spiral-point extension tap for multiple materials, featuring a H6 / 2B-3B tolerance, plug chamfer, V coated powdered metal construction, and 3 flutes. 3G Electric interprets customer demand and delivers this genuine industrial tool across 14 departments — with specialist depth in combustion, pumps and controls — ensuring you get the right answer, not just a catalog.
Frequently Asked Questions
What is an OSG extension tap used for?
An OSG extension tap is used to cut internal threads in deep or hard-to-reach holes. This 7/8"-9 UNC plug-chamfer tap with V-coated powdered metal construction handles multiple materials including steel and stainless steel, providing extended reach for applications like die and mold work.
What are the specifications of the OSG 7/8"-9 UNC extension tap?
This OSG extension tap has a 7/8"-9 UNC thread size, H6 / 2B-3B tolerance, 3 flutes, plug chamfer, and V-coated powdered metal body. The manufacturer part number is 1653505308. It is designed for threading multiple materials with a spiral-point geometry for chip evacuation.
Where to buy OSG extension taps worldwide?
3G Electric supplies OSG extension taps worldwide, handling full logistics and customs clearance. As a global industrial sourcing partner, we provide this 7/8"-9 UNC tap (MPN 1653505308) and other OSG tooling to customers across 14 industrial departments, including machining and tooling.
How to select the right OSG extension tap for a job?
Select an OSG extension tap based on thread size, chamfer type, and material. For deep holes, choose a plug chamfer like this 7/8"-9 UNC tap. Match the H6 / 2B-3B tolerance to your thread class requirement. V-coated powdered metal taps suit harder materials; consult OSG's application data for optimal speeds and feeds.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-point extension taps for multiple materials. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
