| THREAD SERIES DESIGNATOR | UNRF |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| THREAD QUANTITY PER INCH | 28 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.25 INCHES NOMINAL |
| FASTENER LENGTH | 1.75 INCHES NOMINAL |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS6382 ASSN STD ALL MATERIAL RESPONSES OR |
| AMS6414 ASSN STD ALL MATERIAL RESPONSES AND |
| AMS6415 ASSN STD ALL MATERIAL RESPONSES OR |
| AMS6382 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |
| 43.0 ROCKWELL C MAXIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |
| HEAD STYLE | FILLISTER |
| HEAD DIAMETER | 0.375 INCHES NOMINAL |
| HEAD HEIGHT | 0.250 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | HEXAGON |
| WIDTH ACROSS FLATS | 0.188 INCHES MINIMUM |
| SPECIAL TEST FEATURES | MAGNETIC PARTICLE INSPECTION E1444 |
| CRITICALITY CODE JUSTIFICATION | SPCL AND |
| CQFM AND |
| CQBC |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW-ROLLED THREADS CAP HEX SOCKET, CYLNDRICAL HEAD |