Guaranteed to fit Juki sewing machine models:
AMS-343C, APW-235, DLM-5200, DLM-5200N, DLM-5210, DLM-5210N, DMN-5420-6, DMN-5420N-7, DSC-245-4, DSC-245-5, DSC-245-6, DSC-246, DSC-246-4, DSC-246-6, DSC-246-7, LS-1340, LS-1341, LS-1342, LS-1342-2, LS-340, LS-340V, LS-341N, LS-341N-7, LU-1508H, LU-1508N, LU-1508NH, LU-1510N-7, LU-1510NA-7, LU-562, LU-562N, LU-563, LU-563N, LZ-2280N-7, LZ-2290, LZ-2290-7, MH-481-4, MH-481-5, MH-486-4, MH-486-5, MO-103N, MO-104N, MO-134, MO-1500G, MO-1500G-T015, MO-1500H, MO-1500H-T015, MO-1504G-OM6, MO-1514BD6, MO-1516G-FF6, MO-2400, MO-2404-0D4, MO-2414-BD4, MO-2416DD4, MO-2504, MO-2504-0D4, MO-2514, MO-2514-BD4, MO-2516, MO-2516-DD6, MO-352, MO-353, MO-354, MO-355, MO-3704, MO-3704-0E4, MO-3714-BE6, MO-3716-DE4, MO-3900, MO-804, MO-804-0D4, MO-814, MO-814-BD4, MO-816, MO-816-DD4, MOF-3904-0E4, MOF-3914-BE6, MOG-2404-0M6, MOG-2404N-0M6, MOG-2414-BH6, MOG-2414N-BH6, MOG-2416-FF6, MOG-2416N-FF6, MOG-2504-OM6, MOG-2514-BH6, MOG-2516-FF6, MOG-3704, MOG-3714, MOG-3716, MOJ-2504N-OF6-600, MOJ-2514N-BH6-600, MOJ-2516N-FF6-600, MOJ-3904, MOJ-3914, MOJ-3916, MOK-2504N-OF6-600, MOK-2514N-BH6-600, MOK-2516N-FF6-600, MOL-103P-CN, MOL-103PN, MOL-154, MOR-2504-0D4-300, MOR-2514-BD4-307, MOR-2516-DD4-300, MOR-2514-DD4-300, MOR-2516-BD4-307, MS-19, MS-191, MS-191A, MS-26, MS-261, MS-261J, MS-26G, PLC-1710, PLC-1710-7, PLC-1760, PLC-1760-7, PLC-1760L, PLN-985, PLN-986, TO32, TO34, TO40, TO52, TSC-461, TSN-421

Guaranteed to fit Union Special sewing machine models:
SP151H429M032, SP151H430M32, SP151H829M032, SP151H829M040, SP151H830M032, SP151H830M040, SP161H829M032, SP161H829M040, SP161H830M032, SP161H830M040, SP161S400M032, SP161S400M032C, SP161S400M040C, SP161S400M048C, SP161S800M032, SP161S800M040, SP161S800M048C, SP161S900M032C, SP161S900M040C, SP161S900M048C, SP172S900HBE, SP172S400HAC, SP172S400HBE, SP172S400MACC, SP172S800MAAC, SP172S800MACC, SP172S800MADC, SP172S800MBDC, SP172S900HAC, SP172S900HAD, SP172S900HAE, SP172S900HBD, SP172S900MACC, SP172S900MADC, SP172S900MAEC, SP172S900MBDC