OSG Extension Tap: 3/8"-16 UNC, H3 / 2B-3B, 3 Flute, Plug Chamfer
The OSG Extension Tap (MPN 1295301) is a 3/8"-16 UNC spiral-point extension tap with a plug chamfer, made from black oxide high-speed steel. It features an H3 / 2B-3B tolerance class and 3 flutes, designed for…
SKU 3G-OTH-313546
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 1295301) is a 3/8"-16 UNC spiral-point extension tap with a plug chamfer, made from black oxide high-speed steel. It features an H3 / 2B-3B tolerance class and 3 flutes, 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 deep or hard-to-reach holes. The extended shank allows threading in locations where a standard tap cannot reach, such as in engine blocks or deep bores. This 3/8"-16 UNC plug chamfer tap is designed for through-hole threading in metalworking applications.
What are the specifications of the OSG 1295301 extension tap?
The OSG 1295301 is a 3/8"-16 UNC spiral-point extension tap with a plug chamfer. It has 3 flutes, a H3 / 2B-3B tolerance class, and is made from black oxide high-speed steel. This design provides good wear resistance and chip evacuation for threading in steel and other materials.
Where to buy OSG extension taps worldwide?
3G Electric supplies OSG extension taps like the 1295301 to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial sourcing partner, we provide genuine OSG cutting tools and can quote for your specific thread size and quantity requirements.
How to select the right OSG extension tap for deep hole threading?
Select an OSG extension tap based on thread size, pitch, and hole depth. For UNC 3/8"-16 threads, ensure the tap has a plug chamfer for through holes and a H3 tolerance for class 2B fit. The extended shank length must exceed the hole depth. Use proper cutting fluid and rigid tapping equipment for best 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.
