Keep some extra mounting nuts and washers in your toolbox.
These nuts and washers fit F-81s or any threaded connector with a standard 3/8-32
UNEF thread pattern.
1.50 in. wide x 0.75 in. high x 4 in. deep
Volume: 4.50 cubic in.
Weight: 0.2 lbs.
Quantity: 1 ea.
10.50 in. wide x 5.25 in. high x 11 in. deep
Volume: 606.38 cubic in.
Weight: 24.2 lbs.
Quantity: 100 ea.