Cup washers are designed to protect the head of a metal screw from electrical contact. They are designed to accommodate the most common screw head-styles including binder, round, pan, hex, and fillister, in sizes from #4 to 1/4". Cup washers are molded from tough, electrically insulating nylon 6/6.
May also be available in Nylon, PVC, Polypropylene, Phenolic, PTFE, G10, Kel-F®, Delrin/Acetal, Neoprene, Mylar, Glass-Filled Nylon, Peek, CPVC, ABS, PVDF / Kynar, Isoplast, Polycarbonate, Polyethylene, or Ultem®
May also be available in Nylon, PVC, Polypropylene, Phenolic, PTFE, G10, Kel-F®, Delrin/Acetal, Neoprene, Mylar, Glass-Filled Nylon, Peek, CPVC, ABS, PVDF / Kynar, Isoplast, Polycarbonate, Polyethylene, or Ultem®
Nylon Cup Washers Variations
| Description | A | B | C | D | E | Quote |
| CW 4-040 | 0.305 | 0.245 | 0.115 | 0.117 | 0.157 |  |
| CW 6-040 | 0.36 | 0.3 | 0.14 | 0.142 | 0.182 | |
| CW 8-040 | 0.414 | 0.354 | 0.171 | 0.166 | 0.206 | |
| CW 8-041 | 0.414 | 0.354 | 0.171 | 0.13 | 0.17 | |
| CW 10-030 | 0.568 | 0.375 | 0.201 | 0.127 | 0.157 | |
| CW 10-040 | 0.47 | 0.41 | 0.194 | 0.19 | 0.23 | |
| CW 250-040 | 0.595 | 0.535 | 0.257 | 0.247 | 0.289 | |
| CW 312-375 | 0.875 | 0.625 | 0.344 | 0.25 | 0.375 | |
| CW 8-042 | 0.497 | 0.389 | 0.187 | 0.093 | 0.139 | |
| CW 312-500 | 0.875 | 0.625 | 0.344 | 0.375 | 0.5 | |
| CW 250-250 | 1 | 0.5 | 0.26 | 0.15 | 0.198 | |
