This model is economy linear stepper motor which named Nema 11 external linear actuator, the motor part is 34mm 1.8 degree 0.75A Nema 11 stepper motor. It was integrated with 100mm Tr4.76*0.635 threaded rod and a POM screw nut move along the threaded rod.
 
Electrical Specification : 
Manufacturer Part Number: 11HY3401-100N476
Motor Type: External Linear Stepper
Step Angle: 1.8 deg
Holding Torque: 6.0Ncm
Rated Current/phase: 0.75A
Phase Resistance: 3.2ohms
Voltage: 2.4V
Inductance: 2.0mH ± 20%(1KHz)
 
Physical Specification : 
Frame Size: 28 x 28mm
Body Length: 34mm
Lead Screw Length: 150mm（3.937"）
Lead Screw Diameter: Φ4.76mm
Lead /Step:0.3175mm
Lead/Revolution: 0.635mm
Number of Leads: 4
Lead Length: 300mm
Weight : 150g