| CENTER HOLE SHAPE STYLE | ROUND |
| COLOR | GREEN OR BROWN OR BRONZE OVERALL |
| CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR |
| HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| HOLE DIAMETER | 0.214 INCHES MINIMUM AND 0.227 INCHES MAXIMUM |
| OVERALL DIAMETER | 0.495 INCHES MINIMUM AND 0.515 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM F436,TYPE I-CARBON STEEL AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | WASHER,FLAT |
| PERIPHERAL SHAPE STYLE | ROUND |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BASTM F1941/F1941M-2016 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC AND CHROMATE OVERALL |
| THICKNESS | 0.036 INCHES MINIMUM AND 0.065 INCHES MAXIMUM |