Union Special UBT Knives

39549JCT Lower knife single end carbide tip for Union Special 39500 overlock machine.

57770A Upper knife Union Special 57700 machine.

52970D Upper knife for Union Special 52900,57900 machines.

52970C Upper knife for Union Special 52900,57900 machines.

52770L Upper knife for old style trimming mechanism Union Special 52700BR,BS,BT,BU machines.

52770C same as 52770D Upper knife for Union Special 52700BR,BS,BT,BU machines.

52749A Lower knife for Union Special 52700BR,BS,BT,BU machines.

51270S Top knife for Union Special 51200BB machine.

51249B Lower knife for Union Special 51200,56200 machines.

39570K Upper knife angled for hemmer Union Special 39500 overlock machine.