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By Raco 

Collection Name:  BLOCK-LOC®

Catalog ID: 689B

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

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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

Resources and Downloads


Sales Drawings


RACO: BLOCK-LOC® Masonry Box Support

Terms and Conditions