Which tool is typically used to tighten fittings on refrigerant hoses?
Wrench or spanner
Refrigerant hose fittings are threaded flare or union connections that must be tightened to a set torque without damaging the seal.
A wrench or spanner grips the hex on the fitting and applies controlled rotational torque, which is exactly what a threaded connection needs.
A screwdriver drives screws, a hammer applies impact, and a file removes material, none of which can properly tighten a threaded hose fitting.
Hence, a wrench or spanner is used.
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