Insert fitting devices, assemblies and couplings

An insertion fitting device for coupling to a flowpath, comprising:

• a first fitting assembly, comprising:
• a first coupler that includes a first through hole and a stem portion, the first through hole extending through the stem portion;
• a first nut that includes a second through hole, a rim portion and a body portion;
• and a first body member that includes a third through hole and an outer flange, wherein the first body member is positioned at least partially in the first through hole of the first coupler with an end of the stem portion engaging the outer flange, wherein the first body member and the stem portion of the first coupler are positioned at least partially in the second through hole of the body portion of the first nut, wherein an inner side of the body portion of the first nut threadably engages with an outer side of the stem portion of the first coupler such that the outer flange is secured between the rim portion of the first nut and the end of the stem portion of the first coupler, wherein a connection portion of the first body member extends through and past the second through hole of the rim portion of the first nut, wherein the third through hole of the first body member extends through the connection portion, wherein the connection portion of the first body member includes at least one first locking slot extending therethrough from an exterior surface thereof to the third through hole, and wherein the first fitting assembly further comprises a lock clip configured to extend through the at least one first locking slot and into the third through hole;
• and a second fitting assembly, comprising:
• a second coupler that includes a fourth through hole and a stem portion;
• a second nut that includes a fifth through hole, a rim portion and a body portion;
• and a second body member that includes a sixth through hole and an outer flange, wherein the second body member is positioned at least partially in the fourth through hole of the second coupler with an end of the stem portion engaging the outer flange of the second body member, wherein an inner side of the body portion of the second nut threadably engages with an outer side of the stem portion of the second coupler such that the outer flange of the second body member is secured between the rim portion of the second nut and the end of the stem portion of the second coupler, and wherein a connection portion of the second body member extends through and past the fifth through hole of the rim portion of the second nut, and the sixth through hole of the second body member extends through the connection portion of the second body member.