Buy the correct tap if you need to clean the threads. I bought a cheap HF set a while back that is poor quality but works most of the time. I fill in with what isn't included in the set.

Some place like Ace Hardware may have a washer. Lowes etal may have one in the specialty section. Lots of places online will have the washer.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.