(Note: Measurements are outside max. dimensions unless stated otherwise).
20th Century : Door knocker striking button plate.
Diam. 37mm. (1 7/16")
Supplied with 102mm. (4") x 6mm threaded rod. (Will need to be cut to length).
Option : Square nut with chamfered sides.
12mm. (7/16") x 12mm. (7/16") x 5mm. (3/16") (variable).
Option : Octagonal capstan brass nut.
Diam. 31mm. (1 3/16")
Width side to side 29mm. (1 1/8")
Height 18mm. (11/16")
Option : Round bell brass nut.
Diam 21mm. (13/16")
Height 8mm. (5/16")