| THREAD SERIES DESIGNATOR | UNJF | 
| NOMINAL THREAD DIAMETER | 0.250 INCHES | 
| THREAD QUANTITY PER INCH | 28 | 
| THREAD CLASS | 3A | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 0.310 INCHES NOMINAL | 
| FASTENER LENGTH | 1.325 INCHES MINIMUM AND | 
 | 1.335 INCHES MAXIMUM | 
| MATERIAL | NICKEL ALLOY OVERALL | 
| MATERIAL DOCUMENT AND CLASSIFICATION | PWA 96 MFR REF SINGLE MATERIAL RESPONSE OVERALL | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | PWA 36545-3 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD | 
 | PWA 36545-3 MFR REF SINGLE TREATMENT RESPONSE THREADS | 
| HEAD STYLE | HEXAGON EXTENDED WASHER | 
| HEAD HEIGHT | 0.240 INCHES MINIMUM AND | 
 | 0.260 INCHES MAXIMUM | 
| WIDTH BETWEEN FLATS | 0.497 INCHES NOMINAL | 
| EXTENDED WASHER DIAMETER | 0.460 INCHES MINIMUM AND | 
 | 0.510 INCHES MAXIMUM | 
| EXTENDED WASHER THICKNESS | 0.006 INCHES MINIMUM AND | 
 | 0.016 INCHES MAXIMUM | 
| EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 | 
| FIRST DIAMETER FROM HEAD | 0.194 INCHES MINIMUM AND | 
 | 0.198 INCHES MAXIMUM | 
| DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 1.015 INCHES MINIMUM AND | 
 | 1.025 INCHES MAXIMUM | 
| SPECIAL FEATURES | SURFACE FINISH OF SHANK AND THREADS IS 32 MICROINCHES | 
| THE MANUFACTURERS DATA |  | 
| MANUFACTURERS CODE | 0UCY9 | 
| DESIGN CONTROL REFERENCE | 4075449 |