| HARDNESS RATING | 24.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| MATERIAL DOCUMENT AND CLASSIFICATION | GR G IAW IFI 100/107(GR 8 EQUIVALENT) ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT,FLG,LKDT .31-18 G8 MB |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.3125 INCHES |
| NUT STYLE | HEXAGON |
| OVERALL HEIGHT | 0.365 INCHES MAXIMUM |
| WASHER OUTSIDE DIAMETER | 0.680 INCHES MAXIMUM |
| WASHER THICKNESS | 0.05 INCHES MINIMUM |
| WIDTH ACROSS FLATS | 0.489 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | D60,TY I IAW F-100 MAGNI BLACK 575 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 18 |
| THREAD SERIES | UNC |