OSG Extension Tap: 3/8"-24 UNF, H3 / 2B-3B, 3 Flute, Plug Chamfer
The OSG Extension Tap (3/8"-24 UNF) is a spiral-point extension tap with a plug chamfer, made from black oxide high-speed steel. It features 3 flutes and is rated H3 / 2B-3B (MPN 1295801).
SKU 3G-OTH-313540
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Product Description
The OSG Extension Tap (3/8"-24 UNF) is a spiral-point extension tap with a plug chamfer, made from black oxide high-speed steel. It features 3 flutes and is rated H3 / 2B-3B (MPN 1295801).
Frequently Asked Questions
What is the OSG Extension Tap 3/8"-24 UNF used for?
The OSG Extension Tap is used for threading blind or deep holes in metal parts where standard taps cannot reach. It is common in automotive, aerospace, and general machining applications requiring precise UNF threads. The 3-flute plug chamfer design helps start threads smoothly in production environments.
What are the specifications of the OSG Extension Tap MPN 1295801?
This OSG extension tap has a 3/8"-24 UNF thread size, H3 / 2B-3B tolerance, 3 flutes, and a plug chamfer. It is made from black oxide high-speed steel for wear resistance. The manufacturer part number is 1295801, and it is classified as a spiral-point extension tap for through-hole threading.
Where to buy the OSG Extension Tap 1295801 worldwide?
You can source the OSG Extension Tap 1295801 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide competitive pricing and reliable sourcing for this OSG tap.
How to select the correct OSG extension tap for a job?
To select the correct OSG extension tap, match the thread size (e.g., 3/8"-24 UNF) and tolerance class (H3 / 2B-3B) to your hole requirements. Consider the material being threaded—black oxide HSS works for steel. Choose a plug chamfer for blind holes and ensure the tap length reaches the depth needed. OSG taps are precision-ground for consistent results.
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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.















