Device for securing a bolt against unauthorised removal has closure part operated by key and fitting over bolt head and containing rotatable ring to secure bolt until released

摘要

The screw-in or push-in bolt has a head and a closure part which is operated by a key (4) and which fits over the bolt head. The closure part has a sleeve (7) housing part of the closing cylinder whilst a ring which fits in the sleeve is connected to the cylinder and is rotatable through same relative to the sleeve. The internal diameter is slightly larger than the maximum diameter of the bolt head and its axial length is measured so that the bolt head slides so far into the ring that radially displaceable detent elements engage behind the underneath of the bolt head when moved by relative rotation of the ring opposite the sleeve.