| HEAD STYLE | FILLISTER EXTENDED WASHER |
| MATERIAL | STEEL COMP 410 OVERALL |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.125 INCHES |
| STYLE DESIGNATOR | COUNTERBORE UNTHREADED |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.285 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 40 |
| THREAD SERIES DESIGNATOR | UNC |
| CONCENTRIC HOLE DEPTH | 0.250 INCHES NOMINAL |
| CONCENTRIC HOLE DIAMETER | 0.120 INCHES MINIMUM AND 0.128 INCHES MAXIMUM |
| COUNTERBORE DEPTH | 0.140 INCHES MINIMUM AND 0.210 INCHES MAXIMUM |
| COUNTERBORE DIAMETER | 0.136 INCHES MINIMUM AND 0.156 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.450 INCHES NOMINAL |
| FASTENER LENGTH | 0.375 INCHES NOMINAL |
| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM OVERALL AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD DIAMETER | 0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM |
| HEAD HEIGHT | 0.342 INCHES MINIMUM AND 0.348 INCHES MAXIMUM |