| CENTER HOLE SHAPE STYLE | ROUND |
| CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR |
| HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| HOLE DIAMETER | 0.251 INCHES MINIMUM AND 0.255 INCHES MAXIMUM |
| OVERALL DIAMETER | 0.521 INCHES MINIMUM AND 0.541 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 4130 OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | WASHER,PLAIN OR COUNTERSUNK |
| PERIPHERAL SHAPE STYLE | ROUND |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THICKNESS | 0.274 INCHES MINIMUM AND 0.290 INCHES MAXIMUM |