Cavity Fit Restrictor

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The ultimate solution for resident safety.


  • Easy to fit with no routing
  • Compatible with standard duty hinges
  • Avaliable in 13mm, 16mm and 17mm cavity heights
  • Compatible with countersunk fixings
  • Can be used on windows without reinforcement
  • Austenitic* stainless steel for enhanced corrosion resistance and strength
  • 12 Year Guarantee (details avaliable upon request)

*Austenitic 304 stainless steel to BS EN 10088-2 Grade 1.4301 for enhanced corrosion resistance


  • Capable of complying with BS 6375-2 and EN 13126-5

Important Note: all separate restrictor variants have been tested and proven to comply with the relevant standards when tested on windows in conjunction with variable geometry friction stays produced by Securistyle. Should the products be used with other hinge types, it is the responsibility of the window fabricator or Systems Company to prove their suitability in use and compliance with relevant standards and/or legislation.

Product Codes

Cavity Fit Restrictor
Part Code Description Cavity Size (Dim 'A') Pin Height (Dim 'B') Restrictor Length (Dim 'C') Box Quantity 
RC1L Cavity Restrictor LH 66mm - - 65.5mm  25
RC1R Cavity Restrictor RH 66mm - - 65.5mm  25
RC2L Cavity Restrictor LH 116mm - - 115.5mm  25
RC2R Cavity Restrictor RH 116mm - - 115.5mm  25
RC3L Cavity Restrictor LH 166mm - - 165.5mm  25
RC3R Cavity Restrictor RH 166mm - - 165.5mm  25
SC1 Locator Pin 13mm  13-14mm 9.5mm  - 25
SC2  Locator Pin 16mm 16-17mm 13.5mm  - 25
SC3  Locator Pin 17mm 17-18mm 14.5mm  - 25
SC4  Locator Pin 13mm 13-14mm 11.5mm  - 25