OSG #10-32 UNF Spiral-Flute Extension Tap
The OSG Extension Tap (#10-32 UNF, MPN 1297500) is a spiral-flute extension tap with a bottoming chamfer, made from high-speed steel. It features 3 flutes and is rated H3 / 2B-3B for thread class compatibility.
SKU 3G-OTH-310974
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 (#10-32 UNF, MPN 1297500) is a spiral-flute extension tap with a bottoming chamfer, made from high-speed steel. It features 3 flutes and is rated H3 / 2B-3B for thread class compatibility.
Frequently Asked Questions
What is the OSG #10-32 UNF extension tap used for?
The OSG #10-32 UNF extension tap is used for threading blind holes in hard-to-reach areas of metal components. Its 3-flute spiral design and bottoming chamfer allow chip evacuation and full thread depth near the hole bottom, common in automotive, aerospace, and general machining applications.
What are the specifications of the OSG 1297500 extension tap?
The OSG 1297500 is a #10-32 UNF extension tap with H3 / 2B-3B tolerance, 3 flutes, bottoming chamfer, and high-speed steel construction. It is designed for threading blind holes in steel and non-ferrous materials, providing precise thread fit for #10-32 UNF fasteners.
Where to buy OSG extension taps worldwide?
You can source OSG extension taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG #10-32 UNF extension tap MPN 1297500.
How to select the correct OSG extension tap for a job?
Select the OSG extension tap based on thread size (e.g., #10-32 UNF), hole type (blind or through), material (steel vs. aluminum), and required thread class (H3 / 2B-3B). For blind holes, choose a bottoming chamfer tap. OSG high-speed steel taps suit general-purpose threading in ferrous metals.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute extension taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.