| MATERIAL | IRON ALLOY 660 |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5734 ASSN STD SINGLE MATERIAL RESPONSE |
| STYLE DESIGNATOR | LOCKED IN |
| DISTANCE FROM SERRATED PORTION TO NUT END | 1.047 INCHES MINIMUM AND |
| 1.077 INCHES MAXIMUM |
| DISTANCE FROM SERRATED PORTION TO STUD END | 0.538 INCHES MINIMUM AND |
| 0.578 INCHES MAXIMUM |
| DISTANCE FROM SERRATED PORTION TO END OF STUD THREAD | 0.127 INCHES MINIMUM AND |
| 0.157 INCHES MAXIMUM |
| OVERALL LENGTH | 1.585 INCHES MINIMUM AND |
| 1.655 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNJF NUT THREAD |
| UNS STUD THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| 0.375 INCHES STUD THREAD |
| THREAD CLASS | 3A NUT THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| 24 STUD THREAD |
| THREAD PITCH DIAMETERS | 0.3497 TO 0.3512 INCHES STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.579 INCHES MINIMUM AND |
| 0.609 INCHES MAXIMUM NUT THREAD |
| 0.381 INCHES MINIMUM AND |
| 0.451 INCHES MAXIMUM STUD THREAD |
| LOCKING FEATURE | RING, LOCK SERRATED |
| SURFACE FINISH | 32.0 MICROINCHES NUT THD |
| 63.0 MICROINCHES STUD THD |
| SERRATION QUANTITY | 17 |
| SERRATION INCLUDED ANGLE | 85.0 DEGREES MINIMUM AND |
| 88.0 DEGREES MAXIMUM |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS51992C643-17 |