Product marked with non-stock in the "Minimum Quantity" column is typically not stocked. This product is available for purchase but because of its limited customer base is usually subject to higher minimum quantities. Digi-Key's rationale for offering non-stocking product follows:
Digi-Key currently stocks hundreds-of-thousands of electronic components and is adding new product daily. This is arguably the broadest product offering backed by inventory in the industry.
But there are literally tens-of-thousands of additional components that are available from our suppliers. Although we cannot justify stocking all of these products because of their limited marketability, we believe it is in the best interest of our customers to know that they are available. Our goal is to give our customers information on the maximum number of product options, and let their choice be based on specifications, price, availability and minimums.
Note that by checking the box to the right of "Items in Stock", just below "Keywords", you may limit your view to product available for off-the-shelf delivery.