| BALL SEAT RADIUS | 0.984 INCHES MINIMUM AND 1.016 INCHES MAXIMUM |
| NUT STYLE | DOUBLE BALL SEAT, HEXAGON |
| NUT HEIGHT | 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-637 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| MATERIAL | STEEL COMP 1132 OR STEEL COMP 1137 OVERALL |
| NOMINAL THREAD SIZE | 0.500 INCHES |
| THREAD CLASS | 2B |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 13 |
| THREAD SERIES | UNIFIED NATIONAL COARSE (UNC) |
| WIDTH ACROSS FLATS | 0.859 INCHES MINIMUM AND 0.891 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 1 CL 3 FED SPEC 1ST TREATMENT RESPONSE AND QQ-Z-325 TY 1 CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OR ZINC OVERALL |