Guaranteed to fit Juki sewing machine models:
AMS-220P, AVP-880, DMN-530-4, DNU-1541, DP-2100, DX-4000QVP, LBH-781, LBH-781-K, LBH-782, LBH-782-K, LBH-783, LBH-783-K, LBH-784, LBH-784-K, LH-1182-4, LH-1182-5, LH-1182-6, LH-2172, LH-2172-6, LK-1850, LS-1342, LS-1342-7, LZ-586, MOG-3704, MOG-3714, MOG-3716

Guaranteed to fit Union Special sewing machine models:
SP151H829M032, SP151H829M040, SP151H830M032, SP151H830M040, SP161H829M032, SP161H829M040, SP161H830M032, SP161H830M040, SP161S800M032, SP161S800M040, SP161800MO48C, SP161S900M032C, SP161900M040C, SP161S900MO48C, SP172S2900HBBE, SP172800MAAC, SP172S800MACC, SP172S800MADC, SP172S800MBDC, SP172S900HAC, SP172S900HAD, SP172S900HAE, SP172S900HBD, SP172S900MACC, SP172S900MADC, SP172S900MAEC, SP172S900MBC