Answered: R7c and Washers

Hi,

This question is in regards to rule R7c:

I wanted to confirm if retaining washers are legal, provided they meet the size requirements of the screws they are used with as above. Functionally, these are completely identical to any normal washer, except that the retaining feature can make them easier to install in some circumstances. Once installed, the retention is too weak to hold anything in a functional way on the robot.

Here’s an example: https://www.robosource.net/spacers-washers/269-washer-retaining-thin.html?search_query=washer&results=9 (Edit to add that this is not the only place these washers are commercially available, you can get them from many different suppliers & stores)

This is the closest previous Q&A I could find: https://vexforum.com/t/answered-rule-r7-c-regarding-legal-washers/43564/1

Yes, these would be legal.