PN 14392 is part of the subassembly of the HF Antenna Longwire System; it is used to set the length of the long wire element.

Antenna Wire: 14379
Antenna Wire Attachment: Chuck Jaws
Diameter: .625 in
Insulation to Space (kV): 180
Length: 5.25 in
Maximum Load: 400 lbs
Voltage Breakdown (kV @ sea level): 10