National Aerospace Standards - Finishing Washer - NAS391B10P
Standard Part
Description: Finishing Washer
Part Number: NAS391B10P
Alternate Part Numbers: No known alternate
Product Overview
A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide an additional bearing area on the material being fastened. It may or may not have a flush flange feature.
Item Specification
| Hole Diameter | 0.190 inches nominal | |
| Outside Diameter | 0.583 inches minimum and 0.603 inches maximum | |
| Overall Height | 0.102 inches minimum and 0.122 inches maximum | |
| Material Thickness | 0.014 inches minimum and 0.022 inches maximum | |
| Material | Copper alloy overall | |
| Material Document and Classification | QQ-B-613 fed spec single material response overall | |
| Surface Treatment | Chromium overall | |
| Style Designator | Finishing |