Wilson 971131 SMA Male to RG58 Crimp Connector - CONNECTORS (WILSON). SMA Male Crimp for RG58 Cable. All the coaxial cables we sell are pre-crimped, so you would only need this crimp connector if you have your own non-crimped cables, or intend to re-crimp our cables. Furthermore, please note that a special crimping tool is needed to install this item to the end of your cable(s). This adapter has a negligible loss of 0.1dB. Wilson 971131 is the manufacturer part number.