| 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 |
| MATERIAL | STEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 4140 OR STEEL COMP 4130 OVERALL |
| NOMINAL THREAD SIZE | 1.625 INCHES |
| NUT HEIGHT | 0.422 INCHES MINIMUM AND 0.453 INCHES MAXIMUM |
| NUT STYLE | TUBE FITTING LOCKNUT |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES | UN |
| THREAD QUANTITY PER INCH | 12 |
| WIDTH ACROSS FLATS | 1.922 INCHES MINIMUM AND 1.954 INCHES MAXIMUM |