SIN-8611 | Singer Bobbin Case Tension Spring 29K71 HA-46089 screw 662

SIN-200984 | Singer Bobbin Case Tension Regulator Screw 1/16" 80 | or 500518 or 151029-001 040-05141184 Pivot screw is 200594

SIN-591 | Singer Tension Reg Screw OR 181937-001/ 504086 3/32 100