| THREAD SERIES | UN |
| NOMINAL THREAD SIZE | 1.625 INCHES |
| THREAD QUANTITY PER INCH | 12 |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| MATERIAL | STEEL COMP 1137 OR |
| STEEL COMP 1141 OR |
| STEEL COMP 4140 OR |
| STEEL COMP 4130 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-637,COMP 1137 FED SPEC 1ST MATERIAL RESPONSE OR |
| QQ-S-637,COMP 1141 FED SPEC 2ND MATERIAL RESPONSE OR |
| MIL-S-562 MIL SPEC 3RD MATERIAL RESPONSE OR |
| MIL-S-6758 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| NUT STYLE | TUBE FITTING LOCKNUT |
| NUT HEIGHT | 0.422 INCHES MINIMUM AND |
| 0.453 INCHES MAXIMUM |
| WIDTH ACROSS FLATS | 1.922 INCHES MINIMUM AND |
| 1.954 INCHES MAXIMUM |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 88044 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | AS5179-20 |