| DISTANCE ACROSS FLATS | 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM |
| MATERIAL DOCUMENT AND CLASSIFICATION | S.143,FSCM K0289 MFR REF SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL CORROSION RESISTING |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD SIZE | 0.250 INCHES NUT THREAD |
| NOMINAL THREAD SIZE | 0.312 INCHES STUD THREAD |
| NUT END SHANK DIAMETER | 0.2489 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| NUT END SHANK LENGTH | 0.190 INCHES NOMINAL |
| OVERALL LENGTH | 1.310 INCHES NOMINAL |
| SHOULDER DIAMETER | 0.560 INCHES NOMINAL |
| SHOULDER LENGTH | 0.120 INCHES NOMINAL |
| SPECIAL FEATURES | 3 HOLES 1.70 MM DIA,2 LOCATED ON SHOULDER,1 LOCATED ON NUT END,DRY FILM LUBRICANT ON SHOULDER FACE |
| STUD END SHANK DIAMETER | 0.3275 INCHES MINIMUM AND 0.3279 INCHES MAXIMUM |
| STUD END SHANK LENGTH | 0.300 INCHES NOMINAL |
| STYLE DESIGNATOR | SHOULDERED AND STEPPED |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | S26-13,FSCM K0289 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A NUT THREAD |
| THREAD CLASS | 3A STUD THREAD |
| THREAD DIRECTION | RIGHT-HAND NUT THREAD |
| THREAD DIRECTION | RIGHT-HAND STUD THREAD |
| THREAD LENGTH | 0.400 INCHES NOMINAL NUT THREAD |
| THREAD LENGTH | 0.300 INCHES NOMINAL STUD THREAD |
| THREAD QUANTITY PER INCH | 24 STUD THREAD |
| THREAD QUANTITY PER INCH | 28 NUT THREAD |
| THREAD SERIES DESIGNATOR | UNJF NUT THREAD |
| THREAD SERIES DESIGNATOR | UNJF STUD THREAD |