| BODY DIAMETER | 0.620 INCHES MINIMUM AND 0.700 INCHES MAXIMUM |
| FABRICATION METHOD | STAMPED |
| NUT STYLE | WING |
| OVERALL HEIGHT | 0.520 INCHES MINIMUM AND 0.600 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | MS-66 MFR REF SINGLE MATERIAL RESPONSE OR MS-67,FSCM 74865 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |
| THREAD QUANTITY PER INCH | 18 |
| WING SPREAD WIDTH | 1.240 INCHES MINIMUM AND 1.300 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | PS-79 CODE 15 MFR REF SINGLE TREATMENT RESPONSE OR PS-1536 CODE 25,FSCM 74865 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |