Suitable for 21100, 21102, 21120, 21122, 21150, 21160, 21162 and 21180.
all (9x) counterbores to DIN 974-1 (D4),
all (9x) nuts DIN 934 M (D4)
By pressing out the nuts countersinks for socket screws become available allowing both fastening variations to be used.
1) D3 clamping screw (2x)