OSG Extension Tap: 5/16"-18 UNC, H3 / 2B-3B, 4 Flute, Plug Chamfer
The OSG Extension Tap (MPN 1290601) is a 5/16"-18 UNC pulley tap with a H3 / 2B-3B tolerance, 4-flute design, plug chamfer, and black oxide high-speed steel construction. 3G Electric interprets your demand for…
SKU 3G-OTH-308209
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 (MPN 1290601) is a 5/16"-18 UNC pulley tap with a H3 / 2B-3B tolerance, 4-flute design, plug chamfer, and black oxide high-speed steel construction. 3G Electric interprets your demand for threading tools and sources this OSG tap across our 14 industrial departments, with specialist depth in cutting tools and controls to ensure you get the right solution.
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 locations, such as deep holes or recessed areas on industrial parts. The extended shank allows access where standard taps cannot reach, making it essential for maintenance and production in machining, automotive, and general manufacturing applications.
What are the specifications of the OSG 5/16"-18 UNC extension tap?
This OSG extension tap has a 5/16"-18 UNC thread size, H3 / 2B-3B tolerance, 4 flutes, and a plug chamfer. It is made from black oxide high-speed steel (MPN 1290601). The H3 fit ensures precise thread class for consistent engagement in steel and other ferrous materials.
Where to buy OSG extension taps worldwide?
3G Electric supplies OSG extension taps worldwide, handling full logistics and customs clearance for international orders. As a global industrial sourcing partner, we provide genuine OSG taps like the 5/16"-18 UNC model (MPN 1290601) to customers across 14 industrial departments, including machining and tooling.
How to select the correct OSG extension tap for a job?
Select an OSG extension tap by matching thread size (e.g., 5/16"-18 UNC), chamfer type (plug for through holes), and material compatibility. For deep or offset holes, ensure the shank length exceeds the required reach. Consult the tap's H3 tolerance for fit requirements in your workpiece material.
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Common applications for OSGOSG Products
3G Electric supplies OSG pulley taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
