| LUBRICATION | WAX |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | 1/2-20 GRADE C ZINC PLATED TOP LOCK NUT |
| MATERIAL DOCUMENT AND CLASSIFICATION | IFI 100/107 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| NUT HEIGHT | 0.427 INCHES MINIMUM AND 0.573 INCHES MAXIMUM |
| NUT STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.736 INCHES MINIMUM AND 0.752 INCHES MAXIMUM |
| SUPPLEMENTARY FEATURES | THREAD REQUIREMENTS0 ANSI B1.1, UNC OR UNF; GRADE C STEEL EQUIVALENT TO GRADE 8; WRENCH SIZE-3/4 IN; WEIGHT-0.0346 LBS |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM F1941, FE/ZN 3 AT ASSN STD ALL TREATMENT RESPONSES OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES | UNC |