| MATERIAL | STEEL OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| CROSS-SECTIONAL SHAPE | HEXAGON |
| WIDTH ACROSS FLATS | 2.062 INCHES NOMINAL |
| STYLE DESIGNATOR | FLANGED LEFT AND RIGHT INTERNAL THREADS |
| FLANGE THICKNESS | 2.500 INCHES NOMINAL |
| LENGTH | 1.374 INCHES NOMINAL |
| FLANGE WIDTH ACROSS FLATS | 2.062 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNC LEFT INTERNAL (INCLUDES THRU THREAD) |
| UNF RIGHT INTERNAL |
| NOMINAL THREAD SIZE | 0.375 INCHES LEFT INTERNAL (INCLUDES THRU THREAD) |
| 0.500 INCHES RIGHT INTERNAL |
| THREAD QUANTITY PER INCH | 16 LEFT INTERNAL (INCLUDES THRU THREAD) |
| 20 RIGHT INTERNAL |
| THREAD DIRECTION | RIGHT-HAND LEFT INTERNAL (INCLUDES THRU THREAD) |
| RIGHT-HAND RIGHT INTERNAL |
| THREAD LENGTH | 0.415 INCHES NOMINAL LEFT INTERNAL (INCLUDES THRU THREAD) |
| 0.625 INCHES NOMINAL RIGHT INTERNAL |
| SPECIAL FEATURES | ROCKWELL C28-C33 |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT,ARMOR MOUNTING |