| THREAD SERIES DESIGNATOR | UNC |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL COMP 1005 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J403 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-Z-325 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,LOCKWASHER/ WITH INT TOOTH WASHER |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 21450 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | 420494 |