OSG Extension Tap: 5/16"-18 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer
The OSG Extension Tap (SKU 2WAU2) is a 5/16"-18 UNC spiral-point extension tap with a plug chamfer, made from high-speed steel. It features an H3 / 2B-3B tolerance class and 2 flutes, identified by manufacturer part…
SKU 3G-OTH-313565
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Product Description
The OSG Extension Tap (SKU 2WAU2) is a 5/16"-18 UNC spiral-point extension tap with a plug chamfer, made from high-speed steel. It features an H3 / 2B-3B tolerance class and 2 flutes, identified by manufacturer part number 1295200.
Frequently Asked Questions
What is an OSG extension tap used for?
An OSG extension tap is used to thread blind holes or reach recessed areas in metal parts where a standard tap cannot reach. It is common in automotive, aerospace, and general machining applications that require precise internal threads in deep or obstructed locations.
What are the specifications of the OSG 1295200 extension tap?
The OSG 1295200 is a 5/16"-18 UNC spiral-point extension tap with a plug chamfer, H3 / 2B-3B tolerance, and 2 flutes. It is made of high-speed steel and is designed for through-hole threading in steel, stainless steel, and other ferrous materials.
Where to buy OSG extension taps worldwide?
3G Electric supplies OSG extension taps like the 1295200 to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time on this and other OSG tooling.
How to select the correct OSG extension tap for a job?
Select an OSG extension tap based on thread size (e.g., 5/16"-18 UNC), material (high-speed steel for general use), flute count (2-flute for chip evacuation), and reach length. Match the chamfer type (plug for blind holes) and tolerance class (H3 for 2B-3B fit) to your application requirements.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-point extension taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
