Ubiquiti RocketDish RD-5G31-AC Quick Start Manual page 8

5. The Elevation Rod includes washers and nuts. Remove one
nut, one spring lock washer, and one washer. Use them to
secure the Elevation Rod when assembling.
6. Attach the Elevation Rod to the Mounting Bracket.
a. Insert the Elevation Rod into the Mounting Bracket.
b. Secure the Elevation Rod with the washer, spring lock
washer, and nut.
7. Each M10x170 Carriage Bolt includes a washer, spring lock
washer, and nut. Remove these and use them to secure the
bolts when assembling in step 13.
8. Insert the four M10x170 Carriage Bolts into the Mounting
Bracket.