| EXTENDED WASHER DIAMETER | 0.850 INCHES MINIMUM AND 0.890 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.070 INCHES MINIMUM AND 0.085 INCHES MAXIMUM |
| FASTENER LENGTH | 0.850 INCHES MINIMUM AND 0.910 INCHES MAXIMUM |
| HEAD HEIGHT | 0.376 INCHES MINIMUM AND 0.415 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON EXTENDED WASHER |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAEGR8 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL |
| NOMINAL THREAD DIAMETER | 0.438 INCHES |
| POINT STYLE | FLAT |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNF |
| WIDTH ACROSS FLATS | 0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.683 INCHES MINIMUM |