Ahh yes.. if anyone has physical access to your bolt and nut, you're probably almost screwed, especially if they have not yet disassembled the device. If they were stupid enough to unlock the nut and spill out the washers randomly, then you have some time to move the coins (assuming that was not your only copy of the seed phrase).
As was mentioned earlier keep a record elsewhere of the order obfuscated by a simple method like just the first letter of each and put them on the bolt out of order.