RES-LOK Concealed Restrictor

Res-lok Concealed RestrictorThe ultimate guard in window restriction

  • Automatic locking
  • Automatic engagement
  • Concealed fitting
  • Restricts sash to 100mm opening
  • Dedicated key release
  • Retro fitting option
  • Suitable for all window styles: PVCu, Aluminium & Timber
  • Conforms to BS EN 14351:2006 Clause 4.8
  • Constructed from stainless steel and zinc alloy
  • Supplied in self colour
  • Studs supplied separately

Res-lok Concealed RestrictorRes-lok Concealed Restrictor Dimensions



Restrictors Arm length Left hand Right hand
Res-Lok 105mm JBC327 JBC328
Res-Lok extended 113mm JBC234/LH JBC234/RH
Res-Lok extra extended 120mm JBC234/120/LH JBC234/120/RH



Stud plates (height) 11.50mm 12.50mm 13.50mm 14.50mm
Res-Lok JBC261/11.5 JBC261/12.5 JBC261/13.5 JBC261/14.5
Res-Lok extended JBC261/11.5 JBC261/12.5 JBC261/13.5 JBC261/14.5
Res-Lok extra extended JBC261/11.5 JBC261/12.5 JBC261/13.5 JBC261/14.5

Note: To ensure correct operation of the restrictor, it is important that the correct stud plate height is used to suit the cavity between the sash and the frame.

Spare Key: JBC486

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