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ISO 14540 stardard
ISO 14540 specifies the requirements for screw-to-connect hydraulic quick couplers designed for high-pressure applications, with a working pressure of 720 bar (10,440 psi). These couplings are widely used in hydraulic jacks, torque wrenches, and rescue tools due to their ability to provide a secure, leak-free connection under extreme pressure conditions.
The Screw-to-Connect Mechanism ensures a strong, reliable connection that resists pressure-induced disconnection. Designed to operate at 720 bar, making them suitable for demanding hydraulic applications.These couplers are typically available only with NPT threads, ensuring global interchangeability.
| Image | Name | Price | Buy | hf:tax:pa_body-size | hf:tax:pa_thread |
|---|---|---|---|---|---|
 | NPT 3/8″ Thread ISO 14540 High Pressure Quick Coupling Set, Poppet Valve | $11.00 | 3-8 | npt-3-8 npt-3-8-m | |
 | NPT 3/8″ Thread ISO 14540 High Pressure Quick Coupling Male Plug, Poppet | $3.50 | 3-8 | npt-3-8 | |
 | NPT 3/8″ Thread ISO 14540 High Pressure Quick Coupling Female Coupler, Poppet | $7.50 | 3-8 | npt-3-8-m | |
 | NPT 3/8″ Thread ISO 14540 High Pressure Quick Coupling Set, Ball Valve | $11.00 | 3-8 | npt-3-8 npt-3-8-m | |
 | NPT 3/8″ Thread ISO 14540 High Pressure Quick Coupling Male Plug, Ball | $3.50 | 3-8 | npt-3-8 | |
 | NPT 3/8″ Thread ISO 14540 High Pressure Quick Coupling Female Coupler, Ball | $7.50 | 3-8 | npt-3-8-m | |
 | NPT 1/4″ Thread ISO 14540 High Pressure Quick Coupling Set, Ball Valve | $10.10 | 1-4 | npt-1-4 npt-1-4-m | |
 | NPT 1/4″ Thread ISO 14540 High Pressure Quick Coupling Male Plug, Ball | $3.50 | 1-4 | npt-1-4 | |
 | NPT 1/4″ Thread ISO 14540 High Pressure Quick Coupling Female Coupler, Ball | $6.60 | 1-4 | npt-1-4-m |