Yep..
https://www.treasurydirect.gov/
You can buy U.S. savings bonds there the same way.
Do a search OT, we have discussed these at length here a couple times recently. I really like this as I almost feel like a collector (As I grow my collection of T-bills).
I usually buy mine in $10K Bills for flexibility. For example, if you had $120K to invest...you could ladder 4 $10K 13-week bills in June, 4 in July, and 4 in August. Each actually costs around $9867.17 and matures at $10K. In September the first 4 mature. If you have decided to reinvest, then you can buy 4 more (or 3 or two)...each at the approx $9867.17 amount. Any that you do not reinvest put $10K into your checking account. If you reinvest all 4, just the interest goes into your account. About $135 each (about $540). The same the next month. As long as you keep reinvesting (and rates do not drop much), you get the approx. $540 each month. When I accumulate much money in my account, I just buy another. I treat it like a savings account (And don't keep much cash on hand). I used to keep a big emergency fund, but now I just keep most of my money in the T-Bill account (with the nice return) and figure my credit card will get me by for an emergency until the next month when I can choose to not to reinvest a bill or two.
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