| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.266 INCHES NOMINAL |
| FASTENER LENGTH | 0.344 INCHES MINIMUM AND |
| 0.375 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 1050 PRIMARY WASHER |
| STEEL COMP 1022 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE 1050 ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| SAE 1022 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | CADMIUM AND |
| CHROMATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY2 CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| HEAD STYLE | FLAT COUNTERSUNK |
| HEAD DIAMETER | 0.305 INCHES NOMINAL |
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND |
| 101.0 DEGREES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FINISHING |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.640 INCHES MINIMUM AND |
| 0.660 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.015 INCHES MINIMUM AND |
| 0.021 INCHES MAXIMUM |