| CRITICALITY CODE JUSTIFICATION | FEAT |
| LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J429, GRADE 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | NUT, FLG, LKDT .25-20 G5 ZY |
| PROPRIETARY CHARACTERISTICS | NPAC |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| NUT STYLE | HEXAGON |
| OVERALL HEIGHT | 0.300 INCHES MAXIMUM |
| SPECIAL FEATURES | TM 9-2320-360-24P FIG 90; NHA NSN 2510-01-354-5446 CAB ASSEMBLY; WEAPON SYSTEM ESSENTIAL; CONE SEAT FEATURE |
| WASHER OUTSIDE DIAMETER | 0.560 INCHES MAXIMUM |
| WASHER THICKNESS | 0.288 INCHES NOMINAL |
| WIDTH ACROSS FLATS | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | F-100, PL20, TYPE I, GRADE 2, CLASS B MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNC |