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Installing Electromagnetic Locks on Non-Standard Thickness Doors

Updated on October 17, 2011
Securitron EASB
Securitron EASB

When you need to install an electromagnetic lock on a door of a thickness other than the standard 1-3/4 inches on an outswing application, the only part that is really affected is the sex nut or sex bolt - the fastener that holds the armature onto the door. Why this is important is because electromagnetic locks are packed standard with a sex nut for 1-3/4 doors and longer sex-bolts may be available only at extra charge.

Securitron calls their armature fasteners sex bolts instead of sex nuts and does not offer them in lengths. In the past I have adapted their GDB Glass Door Bracket for use on extra thick doors with success. The GDB is designed to be glued onto glass or Herculite doors, but since the armature attaches to the plate instead of the door, the installer can adapt the plate to be fastened to any type or thickness of door and thereby give themselves a way to install Securitron on extra thick door applications. This method does not conform to manufacturer's specifications.

Although it will not help you install a mag on a non-standard thickness door application, the Securitron EASB Energy Absorbing Sex Bolt bears mentioning, since we are talking about armature fasteners. The EASB is essentially a great big sex bolt. Use the EASB in high security applications where the exposed armature fastener on the outside of the door may be subject to attack.

RCI (Rutherford Controls International) calls their armature fasteners Armature Bolts and they offer them in three sizes to accommodate up to 3 inch doors.

  • ARMB255 accommodates door thicknesses from 1-3/4 inches to 2-1/4 inches.
  • ARMB270 accommodates door thicknesses from 2-1/4 inches to 2-3/4 inches
  • ARMB280 accommodates door thicknesses from 2-1/2 inches to 3 inches

Bottom line: make sure you measure the door thicknesses whenever you do a site survey, or ascertain the door thickness from the door provider for new construction.




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    • Tom Rubenoff profile image

      Tom Rubenoff 9 years ago from United States

      Sure it does! It's all in the fascinating fastener world.

    • G-Ma Johnson profile image

      Merle Ann Johnson 9 years ago from NW in the land of the Free

      so does this have anything to do with the difference between a Phillips head and a straight head? G-Ma :O) Hugs

    • Tom Rubenoff profile image

      Tom Rubenoff 9 years ago from United States

      My cousin started a magazine a few decades ago, subtitled, "America's Best British Rock Magazine." As he said to me, what does that mean?

    • artfuldodger profile image

      artfuldodger 9 years ago from Earth

      beantown tom rube you are the undisputed Hub master of EM door locks.

      Press ENTER to look up in Wiktionary or CTRL+ENTER to look up in Wikipedia

    • Tom Rubenoff profile image

      Tom Rubenoff 9 years ago from United States

      I'm so confused.

    • Jim Batuyong profile image

      Jim Batuyong 9 years ago from Anaheim, CA

      Hi Tom or is it Tommi? Hmm...Anyway nice hub as usual. See ya!

    • Hawkesdream profile image

      Hawkesdream 9 years ago from Cornwall

      Not you Tom ,me

    • Tom Rubenoff profile image

      Tom Rubenoff 9 years ago from United States

      Female? Me? You flatter me.

    • Hawkesdream profile image

      Hawkesdream 9 years ago from Cornwall

      AWW Teresa? Very consise as always Tom, though being a mere female...............!

    • Tom Rubenoff profile image

      Tom Rubenoff 9 years ago from United States

      Shhhh. ;-)

    • Teresa McGurk profile image

      Sheila 9 years ago from The Other Bangor

      Sexiest hub I ever read!


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