OSG #4-40 UNC Spiral-Point Extension Tap, H2, 2 Flute, Plug Chamfer, HSS
The OSG Extension Tap, #4-40 UNC, is a spiral-point extension tap designed for threading applications. This H2 / 2B-3B rated tool features a plug chamfer, 2 flutes, and is constructed from high-speed steel (MPN 1294000).
SKU 3G-OTH-313643
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Product Description
The OSG Extension Tap, #4-40 UNC, is a spiral-point extension tap designed for threading applications. This H2 / 2B-3B rated tool features a plug chamfer, 2 flutes, and is constructed from high-speed steel (MPN 1294000).
Frequently Asked Questions
What is OSG Extension Tap #4-40 UNC used for?
The OSG Extension Tap #4-40 UNC is used for threading blind or deep holes in metal parts where a standard tap cannot reach. Its extended length and spiral-point design push chips forward, making it ideal for production machining, automotive, and general manufacturing applications.
What are the specifications of OSG Extension Tap #4-40 UNC?
This OSG extension tap has a #4-40 UNC thread size, H2 / 2B-3B tolerance, 2 flutes, plug chamfer, and is made of high-speed steel. The manufacturer part number is 1294000. It is designed for threading through holes in steel, aluminum, and other common workpiece materials.
Where to buy OSG Extension Tap #4-40 UNC worldwide?
3G Electric supplies the OSG Extension Tap #4-40 UNC (MPN 1294000) to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for a quote and lead time on this precision threading tool.
How to select the correct OSG extension tap for a job?
To select the correct OSG extension tap, match the thread size (e.g., #4-40 UNC), chamfer type (plug for through holes), and flute count to your material and hole depth. The H2 / 2B-3B tolerance ensures a standard fit. For deep or blind holes, confirm the extension length meets your reach requirement.
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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.
