Flat Washer Dimensions: 1/4
Military-preferred flat washer dimensional data per MIL-STD-1764 Sections 301-304 — OD, ID (min/max), and thickness for flat round and flat square/radius washers by nominal bolt/screw size (#0 through 3-inch), series (Narrow/Regular/Wide), material (Aluminum Alloy, Carbon Steel, CRES), and finish. Applicable documents: AN960, NAS620, MS9320, MS15795, MS16212, NAS1401. Used for bearing area, joint stack-up, and clearance calculations in aerospace and military hardware design.
| nominal size | record id | applicable document | finish | id max in (in) | id min in (in) | material | nominal size decimal in (in) | od in (in) | part number | series | thickness in (in) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | AN960_416L_14_steel_wide | AN960 | Cadmium Plate | 0.281 | 0.255 | Carbon Steel | 0.25 | 0.75 | AN960-416L | Wide | 0.063 |
| 1/4 | AN960_416_14_steel_regular | AN960 | Cadmium Plate | 0.281 | 0.255 | Carbon Steel | 0.25 | 0.5 | AN960-416 | Regular | 0.049 |
| 1/4 | MS15795_A416L_alum_wide | MS15795 | Anodize | 0.281 | 0.255 | Aluminum Alloy | 0.25 | 0.75 | MS15795-A416L | Wide | 0.063 |
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