OSG Extension Tap: 1/4"-20 UNC, H3 / 2B-3B, 2 Flute, Plug Chamfer
The OSG Extension Tap (MPN 1294901) is a 1/4"-20 UNC spiral-point extension tap with a plug chamfer, black oxide high-speed steel construction, and an H3 / 2B-3B tolerance class. It features 2 flutes and is designed…
SKU 3G-OTH-313626
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
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Product Description
The OSG Extension Tap (MPN 1294901) is a 1/4"-20 UNC spiral-point extension tap with a plug chamfer, black oxide high-speed steel construction, and an H3 / 2B-3B tolerance class. It features 2 flutes and is designed for threading applications requiring extended reach.
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. The extended shank provides clearance for tapping operations where standard taps cannot reach. It is commonly applied in automotive, aerospace, and general machining for UNC threads.
What are the specifications of the OSG extension tap 1/4-20 UNC?
This OSG extension tap has a 1/4-20 UNC thread size, H3 / 2B-3B tolerance, 2-flute design, and plug chamfer. It is made from black oxide high-speed steel for wear resistance and chip evacuation. The manufacturer part number is 1294901, and it is a spiral-point extension tap.
Where to buy OSG extension taps worldwide?
You can source OSG extension taps worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the OSG 1294901 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., 1/4-20 UNC), tolerance class (H3 for 2B-3B fit), and chamfer type (plug) to your application. Consider material hardness and hole depth. For deep or obstructed holes, an extension tap provides the necessary reach. Consult OSG's technical data for optimal performance.
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.
