The Northern Lights NL-21-71045 female swivel can be used for the following generators and engines:
- M16C, M20CL, M20CR, M20CR2, M20CRW2, M30C, M30CW, M33C, M33CW, M38CR2, M40C2, M55C2, M65C2, M99C2
- MP40C, MP55C, MP65C, MP80C, MP99C
- LP445D, LP445T, MP445D, MP445H, MP445T, NL445D1, NL445T1, NL445T2
- LP668D, LP668T, NL668T1, NL668T2, MP668D, MP668H, MP668QT, MP668T
- M753K, M753W, M753W2, NL753K, NL753W, NL753W2
- M773LW2
- M843JK, M843NK, M843NW2, M843NW3, NL843JK, NL843NK, NL843NW2, NL843NW3
- L844D, M844K, M844LK, M844K2, M844LK2, M844LW2, M844W2, NL844K, NL844LK, NL844K2, NL844LK2, NL844LW2, NL844W2
- M864K, M864W, M864W3
- L944D, M944T, M944W, NL944D2, NL944T2
- L984, M984K, M984W, ML984
- L1064A, L1064D, M1064A, M1064D, M1064H, M1064T1, M1064T2, NL1064D, NL1064H1, NL1064H2, NL1064T1, NL1064T2
