| HEAD HEIGHT | 0.177 INCHES MINIMUM AND 0.188 INCHES MAXIMUM |
| HEAD STYLE | KNURLED NO. 1 |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL | STEEL OVERALL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,SHOULDER |
| PROPRIETARY CHARACTERISTICS | PACS |
| MINIMUM TENSILE STRENGTH | 140000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| SHOULDER DIAMETER | 0.246 INCHES MINIMUM AND 0.248 INCHES MAXIMUM ALL SHOULDERS |
| SHOULDER LENGTH | 1.250 INCHES NOMINAL ALL SHOULDERS |
| SHOULDER SHAPE | ROUND ALL SHOULDERS |
| SHOULDER WIDTH ACROSS FLATS | 0.125 INCHES NOMINAL ALL SHOULDERS |
| SINGLE SHEAR STRENGTH | 840000 POUNDS PER SQUARE INCH |
| WIDTH ACROSS FLATS | 0.125 INCHES NOMINAL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.355 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNC |
| FASTENER LENGTH | 1.245 INCHES MINIMUM AND 1.255 INCHES MAXIMUM |
| HEAD DIAMETER | 0.357 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |