| THREAD SERIES DESIGNATOR | UNJS NUT THREAD A |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6414 NATIONAL STD/SPEC 1ST MATERIAL RESPONSE OR AMS 6322 NATIONAL STD/SPEC 2ND MATERIAL RESPONSE |
| MATERIAL | STEEL COMP 4340 OR STEEL COMP 8740 |
| III HARDNESS RATING | 39.5 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | STUD, STRAIGHT .6250-11 X .6250-18, 180 KSI SPECIAL THREAD LENGTH |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.6250 INCHES NUT THREAD A |
| NOMINAL THREAD SIZE | 0.6250 INCHES NUT THREAD B |
| OVERALL LENGTH | 2.830 INCHES NOMINAL |
| SPECIAL FEATURES | HEAT TREAT: 180-200 KSI ULTIMATE TENSILE STRENGTH PER AMS-H-6875 |
| SPECIFICATION/STANDARD DATA | 97499-120-237 MANUFACTURERS STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416, TYPE II CLASS 2 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD CLASS | 3A NUT THREAD B |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD A |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD B |
| THREAD LENGTH | 0.770 INCHES MINIMUM NUT THREAD B |
| THREAD LENGTH | 1.560 INCHES MINIMUM NUT THREAD A |
| THREAD PITCH DIAMETERS | +0.5777 TO 0.5792 INCHES NUT THREAD A |
| THREAD QUANTITY PER INCH | 11 NUT THREAD A |
| THREAD QUANTITY PER INCH | 18 NUT THREAD B |
| THREAD SERIES DESIGNATOR | UNJF NUT THREAD B |