A quick connect/disconnect fluid coupling comprising a male nipple and a female coupler: the male nipple having: a male valve body extending along a longitudinal axis, the male valve body having an axially extending through-passage; wherein a radially outward portion of the male valve body has radially outwardly protruding threads, each thread having a first side and an axially opposite second side, wherein the first side is inclined relative to the radially outward portion of the male valve body by a first angle (α) in a range of 30-degrees to 60-degrees, and wherein the second side is inclined relative to the radially outward portion of the male valve body by a second angle (β) in a range of 80-degrees to 100-degrees; and the female coupler having: a female valve body extending along a longitudinal axis, the female valve body having an axially extending through-passage; and a rotatable thread sleeve radially outwardly of the female valve body, the rotatable thread sleeve being supported by the female valve body and being configured to freely rotate about the longitudinal axis of the female valve body; wherein the rotatable thread sleeve has radially inwardly protruding threads that are configured to threadably engage the threads of the male nipple to couple the female coupler to the male nipple; wherein the female coupler includes an actuating sleeve radially outwardly of the rotatable thread sleeve, wherein the actuating sleeve is co-rotatable with the thread sleeve, wherein the actuating sleeve is configured to move between a forward position and rearward position relative to the thread sleeve for engaging or disengaging from the male nipple to provide a locking feature for the coupling, characterised in that the male valve body includes one or more protrusions that are configured to fit within corresponding one or more slots of the actuating sleeve with the actuating sleeve being in the forward position and the coupling members (12, 14) in a fully-coupled position. the male nipple having: a male valve body extending along a longitudinal axis, the male valve body having an axially extending through-passage; wherein a radially outward portion of the male valve body has radially outwardly protruding threads, each thread having a first side and an axially opposite second side, wherein the first side is inclined relative to the radially outward portion of the male valve body by a first angle (α) in a range of 30-degrees to 60-degrees, and wherein the second side is inclined relative to the radially outward portion of the male valve body by a second angle (β) in a range of 80-degrees to 100-degrees; and a male valve body extending along a longitudinal axis, the male valve body having an axially extending through-passage; wherein a radially outward portion of the male valve body has radially outwardly protruding threads, each thread having a first side and an axially opposite second side, wherein the first side is inclined relative to the radially outward portion of the male valve body by a first angle (α) in a range of 30-degrees to 60-degrees, and wherein the second side is inclined relative to the radially outward portion of the male valve body by a second angle (β) in a range of 80-degrees to 100-degrees; and the female coupler having: a female valve body extending along a longitudinal axis, the female valve body having an axially extending through-passage; and a rotatable thread sleeve radially outwardly of the female valve body, the rotatable thread sleeve being supported by the female valve body and being configured to freely rotate about the longitudinal axis of the female valve body; wherein the rotatable thread sleeve has radially inwardly protruding threads that are configured to threadably engage the threads of the male nipple to couple the female coupler to the male nipple; wherein the female coupler includes an actuating sleeve radially outwardly of the rotatable thread sleeve, wherein the actuating sleeve is co-rotatable with the thread sleeve, wherein the actuating sleeve is configured to move between a forward position and rearward position relative to the thread sleeve for engaging or disengaging from the male nipple to provide a locking feature for the coupling, a female valve body extending along a longitudinal axis, the female valve body having an axially extending through-passage; and a rotatable thread sleeve radially outwardly of the female valve body, the rotatable thread sleeve being supported by the female valve body and being configured to freely rotate about the longitudinal axis of the female valve body; wherein the rotatable thread sleeve has radially inwardly protruding threads that are configured to threadably engage the threads of the male nipple to couple the female coupler to the male nipple; wherein the female coupler includes an actuating sleeve radially outwardly of the rotatable thread sleeve, wherein the actuating sleeve is co-rotatable with the thread sleeve, wherein the actuating sleeve is configured to move between a forward position and rearward position relative to the thread sleeve for engaging or disengaging from the male nipple to provide a locking feature for the coupling, characterised in that the male valve body includes one or more protrusions that are configured to fit within corresponding one or more slots of the actuating sleeve with the actuating sleeve being in the forward position and the coupling members (12, 14) in a fully-coupled position.