| MATERIAL | IRON ALLOY 660 |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS5734 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS5737 ASSN STD SINGLE MATERIAL RESPONSE |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| STYLE DESIGNATOR | LOCKED IN |
| DISTANCE FROM END OF STUD END THREADS TO NUT END | 1.282 INCHES MINIMUM AND |
| 1.342 INCHES MAXIMUM |
| OVERALL LENGTH | 1.687 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNJF NUT THREAD |
| UNC STUD THREAD |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| 0.375 INCHES STUD THREAD |
| THREAD CLASS | 3A NUT THREAD |
| 2A STUD THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| 16 STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.440 INCHES MINIMUM AND |
| 0.500 INCHES MAXIMUM NUT THREAD |
| 0.365 INCHES MINIMUM AND |
| 0.390 INCHES MAXIMUM STUD THREAD |
| LOCKING FEATURE | RING, LOCK KEYED |
| SPECIAL FEATURES | FURNISH WITH 2 KEYS PSI 140,000 |
| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND |
| 38.0 ROCKWELL C MAXIMUM |
| SURFACE FINISH | 32.0 MICROINCHES OVERALL |
| 63.0 MICROINCHES BODY |