Abstract: A method and device for locking of a support ring (8) to a scaffolding column (1), wherein the support ring (8) is formed with a through opening (10), and wherein the support ring (8) fits in a complementary and displaceable manner onto the scaffolding column (1), and wherein the method comprises:—providing an external mantel surface of the scaffolding column (1) with a longitudinal column track (4);—providing an inner mantel (12) of the support ring (8) with a ring track (14);—displacing a support ring (8) along and around the scaffolding column (1);—positioning the column track (4) and the ring track (14) next to each other; and—displacing a thread body (22) into the column track (4) and the ring track (14) during rotation of the thread body (22) about a longitudinal axis (28) thereof, a column track depth (6) and a ring track depth (16) having a collective depth being smaller than an external thread diameter (30) of the thread body (22).