Cisco 4G-ANTM-OM-CM Manual page 202

Cisco Aironet 2.4 GHz and 5 GHz Dual-Band Polarization-Diverse Directional Array Antenna (AIR-ANT2566D4M-R)
Figure 5 Exploded View of Antenna and Bracket Hardware Assembly
1 The articulating mount flange bracket that comes
attached to the back of the antenna.
2 The azimuth adjustment pivot.
Here, a 1/4 20 x 1.25-inch stainless steel screw, a
1/4-inch split-lock washer, a 1/4-inch flat washer, and a
1/4-20 Hex nut (in that order) fasten the articulating
mount arm to the flange bracket at the back of the
antenna.
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2
3 The end of the articulating mount arm, which attaches to
the flange bracket fixed to the wall or ceiling.
4 The elevation adjustment pivot.
Here, a 1/4 20 x 1.25-inch stainless steel screw, a
1/4-inch split-lock washer, a 1/4-inch flat washer, and a
1/4-20 Hex nut (in that order) fasten the articulating
mount arm to the flange bracket fixed to the wall or
ceiling.
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4