Type FF Interlock

Type FF Interlock

Isolation interlock

KIRK® Type FF is the smallest of the KIRK® bolt interlocks. It is a key operated mechanical interlock that is suitable for the control of electrical switchgear. The standard unit comes with a stainless steel 1/2” diameter locking bolt with a throw or travel of 3/4”. The locking bolt is used to control the rotation or movement of operating handles or toggles of electrical switchgear. Many suppliers of switchgear equipment have mounting provisions available for KIRK® interlocks.

The Type FF interlock is available in SD series only.

For further technical information please refer to the datasheet.


  • Key actuated lock bolt
  • Hex mounting bolts optional
  • Available in SD (brass)

Type FF Interlock Data Sheet