no securing collar on the gps-rtk2-sma

I have a gps-rtk2 board and the associated antenna connector cable. The cable terminates with a male connector, a threaded bolt. It also has a locking washer and a securing collar - a very thin nut that fits onto the bolt. This allows the connector to be securely fitted onto a case.

I just bought s GPS-rtk2-sma board. This has the SMA bolt fitted to the board, so you don’t need a separate cable, but there is no locking washer or securing collar, so it can’t be securely fitted to the case. Are the parts missing or is this how they are supposed to be shipped?

If the second, then how am I supposed to fit the board to the case securely?

I guess I could go out and buy a washer and a nut, but hardware stores are few and far between, and the nuts they sell tend to be thicker.

The connector on this board does not come with hardware. You’ll need to [source that on your own, or the hardware that comes with part number [WRL-00662 will fit.](Interface Cable RP-SMA to U.FL - 100mm - WRL-00662 - SparkFun Electronics)](Bulkhead Nut & Washer for RP-SMA & SMA: Mount Connector on Enclosure or PCB)