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by Raco 

Collection Name:  BLOCK-LOC®

Catalog ID: 689B

1-Gang BLOCK-LOC® Masonry Box, Gangable, 3-1/2 in. Deep, Conduit KO's

  • Integral brackets securely hold box to concrete block from front and back in masonry block walls, even in irregular openings
  • Gangable masonry boxes offer the option of constructing a box to hold two or more devices
  • TKO® Knockouts allow for design and installation flexibility
  • Supplied with ten 1/2-3/4 in. TKO® knockouts
  • Quick and accurate positioning
  • Break off front tabs
  • 22.5 cu. in. capacity
  • Acceptable for use in 2-hour fire rated walls

Product Details


Bracket Type No Bracket
Color Gray
Drawn or Welded Welded
Fire Resistance Yes
Knockouts 1/2 in - 3/4 in Combination (TKO)
Material Steel
Number of Gang(s) 1-Gang
  • Masonry Box
  • Box
UPC 050169500613


Cubic Capacity 22.5 cu.in
Depth 3.5 in
Raised Ground No

Certifications and Compliance

Certified Listed UL Listed


Carton Quantity 18
Pallet Quantity 1440 EA




RACO: BLOCK-LOC® Masonry Box Support

Sales Drawings

Terms and Conditions