OSG 5/8"-11 UNC Spiral-Flute Extension Tap
The OSG Extension Tap (MPN 1299300) is a 5/8"-11 UNC spiral-flute extension tap, type H3 / 2B-3B with a bottoming chamfer, made of high-speed steel and featuring 4 flutes. 3G Electric interprets your demand for this…
SKU 3G-OTH-310969
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 1299300) is a 5/8"-11 UNC spiral-flute extension tap, type H3 / 2B-3B with a bottoming chamfer, made of high-speed steel and featuring 4 flutes. 3G Electric interprets your demand for this precision threading tool, sources it from OSG, and supports your application with specialist expertise across 14 industrial departments.
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 5/8"-11 UNC bottoming chamfer design allows threading to the bottom of a blind hole, common in automotive, aerospace, and general machining applications.
What are the specifications of the OSG 1299300 extension tap?
The OSG 1299300 is a 5/8"-11 UNC spiral-flute extension tap with a bottoming chamfer, 4 flutes, and H3 / 2B-3B tolerance. It is made of high-speed steel (HSS) and is designed for threading blind holes in ferrous and non-ferrous materials.
Where to buy OSG extension taps worldwide?
3G Electric supplies OSG extension taps worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we source genuine OSG tooling and support your procurement with technical expertise across 14 industrial departments.
How to select the correct OSG extension tap for a blind hole?
Select an OSG extension tap with a bottoming chamfer for blind holes, as it threads close to the bottom. Match the thread size (5/8"-11 UNC), flute count (4), and tolerance class (H3 / 2B-3B) to your application. Use high-speed steel for general-purpose threading in steel and cast iron.
Used in
Common applications for OSGOSG Products
3G Electric supplies OSG spiral-flute extension taps. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.