| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.282 INCHES NOMINAL |
| FASTENER LENGTH | 0.343 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING SECONDARY WASHER |
| STEEL CORROSION RESISTING PRIMARY WASHER |
| STEEL CORROSION RESISTING FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS-QQ-S-763, CLASS 302. COND B ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS-QQ-S-763, CLASS 304. COND A ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS-QQ-S-763, CLASS 384. COND A ASSN STD SINGLE MATERIAL RESPONSE SECONDARY WASHER |
| NASM35338 ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-35 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| HEAD STYLE | PAN |
| HEAD DIAMETER | 0.256 INCHES MINIMUM AND |
| 0.270 INCHES MAXIMUM |
| HEAD HEIGHT | 0.087 INCHES MINIMUM AND |
| 0.097 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| WASHER QUANTITY | 2 |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.253 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.031 INCHES NOMINAL |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.307 INCHES MINIMUM AND |
| 0.320 INCHES MAXIMUM |
| SECONDARY WASHER MATERIAL THICKNESS | 0.013 INCHES MINIMUM AND |
| 0.019 INCHES MAXIMUM |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, PAN HEAD, ASSEMBLED WASHERS, STANDARD SHOULDER WASHER |