Crown Bolt's back up washers are flat washers for rivets. They provide a larger circular bearing surface which helps prevent a rivet head from pulling through the material. It is round with a hole in the center and can also be used as a spacer. The package size designates the inner diameter of the washer. Available in various materials and finishes. Use like materials together for best results.
California residents: see Proposition 65 information
- 10-piece per bag
- Aluminum construction
- Aluminum finish
- 3/16 in. OD