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Semroc Centering Rings Fiber ST-7 to ST-20(2 pieces set with engine hook slot) SEM-CR-7-20EH *

$2.69

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Current Stock: 13

Semroc Centering Rings Fiber ST-7 to BT-20(2 pieces set with engine hook slot) SEM-CR-7-20EH

Laser-cut fiber rings which center an ST-7 motor tube inside an ST-20 tube

Especially useful for making a standard engine mount for ST-20 rocket bodies

Requires one set of two rings

Thickness is 0.05" (.127cm)

ID= 0.759" (1.927cm)

OD= 2.042" (5.18cm)

Made in the USA

Warranty for 1 year from manufacturer defects