| MATERIAL | STEEL COMP 8640 OR |
| STEEL COMP 8740 OR |
| STEEL COMP 4140 |
| MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-624 FED SPEC ALL MATERIAL RESPONSES |
| SURFACE TREATMENT | CADMIUM OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| OVERALL LENGTH | 2.750 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNF NUT THREAD |
| UNC STUD THREAD |
| NOMINAL THREAD SIZE | 0.438 INCHES NUT THREAD |
| 0.438 INCHES STUD THREAD |
| THREAD CLASS | 3A NUT THREAD |
| THREAD QUANTITY PER INCH | 20 NUT THREAD |
| 14 STUD THREAD |
| THREAD PITCH DIAMETERS | 0.3956 TO 0.3976 INCHES STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.690 INCHES MINIMUM NUT THREAD |
| 0.940 INCHES MINIMUM STUD THREAD |
| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND |
| 34.0 ROCKWELL C MAXIMUM |
| DISTANCE FROM COTTER PIN HOLE CENTERLINE TO NUT END | 0.110 INCHES NOMINAL FIRST HOLE |
| COTTER PIN HOLE DIAMETER | 0.065 INCHES MINIMUM AND |
| 0.072 INCHES MAXIMUM FIRST HOLE |