| BEARING SURFACE TYPE | FLAT |
| HARDNESS RATING | 200.0 VICKERS OR FIRTH DIAMOND PYRAMID MINIMUM AND 302.0 VICKERS OR FIRTH DIAMOND PYRAMID MAXIMUM |
| LOCKING FEATURE | FREE-RUNNING ALL METAL DESIGN |
| NUT STYLE | HEXAGON |
| NUT HEIGHT | 6.4 MILLIMETERS MINIMUM AND 6.8 MILLIMETERS MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | ISO898-2, GRADE 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD SIZE | 8.0 MILLIMETERS |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT HEX, ISO 4032 |
| WIDTH ACROSS FLATS | 12.7 MILLIMETERS MINIMUM AND 13.0 MILLIMETERS MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ISO4042, KEY A2D ASSN STD ALL TREATMENT RESPONSES OVERALL |
| SURFACE TREATMENT | ZINC AND CHROMATE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD PITCH DIAMETERS | +1.05 TO 1.25 MILLIMETERS |
| THREAD PITCH IN MILLIMETERS | 1.25 |
| THREAD SERIES | ISO M |
| THREAD TOLERANCE CLASS | 6H INTERNAL |