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4) Superstrut/Unistrut Aluminum Bottom Lock Washer Solar DIY Rack Clamp 1/4,5/16

4) Superstrut/Unistrut Aluminum Bottom Lock Washer Solar DIY Rack Clamp 1/4,5/16


Available in increments of 1
Total Percent Off Per Unit
$4.62 0% $4.6200
$8.78 5% $4.3890
$20.79 10% $4.1580
$39.27 15% $3.9270
$73.92 20% $3.6960

Superstrut/Unistrut Aluminum Flat Washer


Specially designed for solar panel mounting. This washer is perfect for holding down solar panels.

Very strong washer! When properly installed, the holding force of this 1/4" thick washer far exceeds the frame strength of your panel.

This washer locks into place within the unistrut rails and will not turn past a certain point which allows easy tightening of the screw or bolt from atop of the panel.

Can be used as a general flat Unistrut non rusting lock washer (bottom washer) as well.



4 Pieces

6061 - Aluminum 1/4" thick, .32" diam hole, 1 5/8~" outer dimensions.

  • For use in mounting solar panels to Unistrut or Superstrut.
  • Can also be used most anywhere a 1/4" thick aluminum heavy duty unistrut locking washer is needed
  • .32 in. hole diameter (for 1/4" - 5/16" bolt)
  • Precision cut on our Waterjet cutter in Coleman Texas, U.S.A


Assembled Depth (in.)  1 3/8 in  Assembled Height (in.)  .25
Assembled Width (in.)  7/8  in  Certifications and Listings  *No Certifications or Listings 
Color/Finish  Silver/Gray  Electrical Product Type  Strut Fitting 
Gauge  1/4" 6061 Aluminum Manufacturer Warranty  Returns/Refunds allowed
Package Quantity  4 Manufacturer Coleman Air -


Perfect for DIY Solar racking!!

Please see our other Unistrut/Superstrut DIY mounting accessories.

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