What is the correct installation torque for Tube end with UNF GZ, steel, type 53213 when used with air conditioning hoses type 3356 and 3090?

The correct installation torque for Tube end with UNF GZ, steel, type 53213 when used with air conditioning hoses type 3356 and 3090 is 25â30 Nm (Newtonâmetres). Use a calibrated torque wrench, ensure threads and sealing surfaces are clean and lightly lubricated if specified by the hose manufacturer, and tighten smoothly to the final torque without shock. If hose or fitting documentation specifies a different value, follow the manufacturerâs recommendation.

Can Tube end with UNF GZ, steel, type 53213 be used interchangeably on air conditioning hoses type 3356 and 3090?

Short answer: Yes - Tube end with UNF GZ, steel, type 53213 can be used interchangeably on air conditioning hoses type 3356 and 3090, provided the hose assemblies require an external UNF threaded tube end and the dimensions (thread size, sealing face, and insertion depth) match the hose fittings. The product description specifies External threaded tube end UNF for air conditioning hose type 3356 and 3090, material steel, which indicates compatibility. Before use, verify specific thread series/size (UNF), pressure ratings, and manufacturer installation instructions to ensure proper sealing and safety.

Are there specific thread sealants recommended for Tube end with UNF GZ, steel, type 53213 on AC hoses 3356/3090?

Yes. For Tube end with UNF GZ, steel, type 53213 used on AC hoses 3356/3090, choose a thread sealant compatible with steel, UNF fine threads, and refrigeration/air-conditioning service. Recommended types: - PTFE-based thread sealant tape (Teflon tape), white, applied 2â3 wraps on the male UNF threads. Use tape rated for refrigeration and compatible with mineral and synthetic oils. - Anaerobic liquid thread sealants formulated for metal-to-metal threads (medium-strength, removable), e.g., Loctite 242/243 or equivalents, suitable for steel UNF threads and resistant to refrigerants and hydraulic oils. Apply sparingly to male threads per manufacturer instructions. - High-performance non-hardening pipe thread compounds (PTFE/paste) that are oil- and refrigerant-compatible and safe for fine UNF fittings used in AC systems. Avoid general-purpose silicone sealants, curing threadlockers that make disassembly difficult, and sealants that contain acids or reactive solvents. Always verify chemical compatibility with the specific refrigerant and hose materials, follow torque specs for UNF fittings, and consult hose and fitting manufacturer recommendations. If system-critical or warranty-covered, confirm with the hose/fitting supplier that the chosen sealant is approved for Tube end with UNF GZ, steel, type 53213 on hoses 3356/3090.

Tube end with UNF GZ, steel, type 53213

Additional information

Material	CS – steel (cast iron)

External threaded tube end UNF, for air conditioning hose type 3356 and 3090. Material: steel.

List of product variants

Article number	Product variant name	Nominal inner diameter	Working pressure [bar]
BU-53213-06-06-S	End fitting GZ 5/8", hose LW 5/16", steel	-	35
BU-53213-08-08-S	End fitting GZ 3/4", hose LW 13/32", steel	-	35
BU-53213-10-10-S	End fitting GZ 7/8", hose LW 1/2", steel	-	35
BU-53213-10-12-S	End fitting GZ 7/8", hose LW 5/8", steel	-	35
BU-53213-12-12-S	End fitting GZ 1.1/16", hose LW 5/8", steel	-	35