OSG Extension Tap: M8x1.25 Metric, D5 / 4H-6H, 3 Flute, Plug Chamfer
The OSG Extension Tap (M8x1.25 Metric) is a spiral-point extension tap with a D5 / 4H-6H tolerance, plug chamfer, and black oxide high-speed steel construction. It features 3 flutes and is identified by manufacturer…
SKU 3G-OTH-313618
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
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Product Description
The OSG Extension Tap (M8x1.25 Metric) is a spiral-point extension tap with a D5 / 4H-6H tolerance, plug chamfer, and black oxide high-speed steel construction. It features 3 flutes and is identified by manufacturer part number 1111800901.
Frequently Asked Questions
What is an OSG extension tap used for?
An OSG extension tap is used to cut internal threads in hard-to-reach or deep-hole applications. The extended shank allows threading in recessed areas, such as engine blocks or hydraulic manifolds, where standard taps cannot reach. It is common in automotive, aerospace, and general machining.
What are the specifications of the OSG M8x1.25 extension tap?
This OSG extension tap has a metric M8x1.25 thread, D5 / 4H-6H tolerance, 3 flutes, plug chamfer, and black oxide high-speed steel construction. The manufacturer part number is 1111800901. It is designed for through-hole threading with a spiral-point geometry that pushes chips ahead.
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 genuine OSG tooling to any destination. Contact us for pricing and lead time on this M8x1.25 tap or other OSG thread-cutting tools.
How to select the right OSG extension tap for deep-hole threading?
Select an OSG extension tap based on thread size, material, and hole depth. For steel, use black oxide high-speed steel taps like this M8x1.25 model. Ensure the shank length exceeds the hole depth. Match the chamfer type (plug for through-holes) and flute count to chip evacuation needs.
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.
