| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.086 INCHES |
| THREAD QUANTITY PER INCH | 56 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 0.230 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| MATERIAL | STEEL PROPERTY CLASS 18.8 SECONDARY WASHER |
| STEEL PROPERTY CLASS 18.8 PRIMARY WASHER |
| STEEL PROPERTY CLASS 18.8 FASTENER |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | PAN NO. 2 |
| HEAD DIAMETER | 0.145 INCHES MINIMUM AND |
| 0.156 INCHES MAXIMUM |
| HEAD HEIGHT | 0.053 INCHES MINIMUM AND |
| 0.062 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE II |
| WASHER QUANTITY | 2 |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.145 INCHES MINIMUM AND |
| 0.156 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.018 INCHES MINIMUM AND |
| 0.038 INCHES MAXIMUM |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.225 INCHES MINIMUM AND |
| 0.235 INCHES MAXIMUM |
| SECONDARY WASHER MATERIAL THICKNESS | 0.010 INCHES MINIMUM AND |
| 0.030 INCHES MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, PAN HEAD, PHILLIPS, DOUBLE SEMS |