Common Part (Serger) - Upper Blade (Knife)
Singer: 2010 (singer)
J.C. Penny: 7015A
Supreme: ML303
Supreme: ML303R
Supreme: ML4
Supreme: ML93R
Supreme: ML94
National: N10
National: N20
National: N9
Necchi: NL3
Necchi: NL3R
Necchi: NL4
Riccar: RL330F
Riccar: RL340
Riccar: RL343
Riccar: RL343D
Riccar: RL343DR
Nelco: NL304
Janome: 603 (new home)
Janome: 604 (new home)
Alternate Part Numbers: 320414