Semroc Plywood Bulkhead or Block for BT-20 tube(2 ring set) SEM-PB-20P
Used as lightweight bulkheads for gluing on the end of a JT-50 coupler, one ring fits inside the coupler and one on top to match the ID of the tube.
Hole for Screw Eye #10(SE-10)
Thickness assembled: 0.25"
Diameter: 0.736" and 0.710"
Made in the USA
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