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Washers for Foam Insulation
Mount insulation board to foundation walls, roofing, and framing. These washers have a large surface that distributes holding pressure evenly, so they won't crush or pull through insulation.
Galvanized Steel
 |
More durable than plastic, these washers are strong enough to use with cement board in roofing applications.
For Screw Size | ID | Wd. | Thk. | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|
| No. 12, No. 14, No. 15, 1/4" | 0.270" | 2.875" | 0.019" | 50 | 90320A350 | 000000 | ||
Polypropylene
 |
These washers have a large outer diameter that prevents them from pulling through soft insulation.
Temp. Range | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
For Screw Size | ID | OD | Thk. | Min. | Max., ° F | Color | Pkg. Qty. | Pkg. | |||
| No. 12, No. 14, No. 15 | 0.190" | 3.000" | 0.260" | Not Rated | 150 | White | 25 | 90320A380 | 000000 | ||
Polypropylene with Prongs
 |  |
Perforated | Solid |
Prongs sink into rigid insulation and hold the washer in place, so it won't shift during installation.
Perforated—These economical washers are best for interior applications.
Solid—When fastened, these washers flex to create a seal around the connection that blocks out air and moisture. They are most often used on exterior walls to attach weather barriers over insulation.
