Rail buttons are used in place of launch lugs to guide the rocket on the pad until the rocket reaches sufficient speed where the fins will guide the rocket. They are used on BIG rockets, where additional support is needed to prevent the rocket from swaying in the wind.
Parts for Rockets - Launch Lugs, Buttons & Guides - Rail Buttons - eRockets
Thrust Plate for 6 nominal tube, 98mm motor.
6 - 98mm Thrust Plate
G10 Fiberglass CR 98mm/8 [13838] - $27.93 : Apogee Rockets, Model Rocketry Excitement Starts Here
Rail Guides
75mm Min Diameter Motor Retainer
75mm Min Diameter Motor Retainer
Standard Rail Button (fits 1 Rail - 1010)
Final Design – Fin Can Section Subassembly – Ben Staal's Rocketry
Aluminum 6-32 Tube Fasteners (3/pk)
Helicopter Hinges
Conformal Standoff Rail Guide BT70/BT80
HPR Primer – Mountain Man Rockets