| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.190 INCHES |
| THREAD QUANTITY PER INCH | 24 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.914 INCHES NOMINAL |
| FASTENER LENGTH | 0.969 INCHES MINIMUM AND |
| 1.000 INCHES MAXIMUM |
| MATERIAL | STEEL OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| SAE GRADE 2 ASSN STD ALL MATERIAL RESPONSES FASTENER |
| SURFACE TREATMENT | ZINC OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | GM 4342-M CODE 20 FSCM 11862 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND |
| 50.0 ROCKWELL C MAXIMUM PRIMARY WASHER |
| HEAD STYLE | HEXAGON COUNTERSUNK |
| HEAD HEIGHT | 0.165 INCHES MINIMUM AND |
| 0.180 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.305 INCHES MINIMUM AND |
| 0.312 INCHES MAXIMUM |
| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND |
| 82.0 DEGREES MAXIMUM |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | COUNTERSINK EXTERNAL TEETH |
| PRIMARY WASHER MATERIAL THICKNESS | 0.019 INCHES MINIMUM AND |
| 0.025 INCHES MAXIMUM |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 7X677 |
| DESIGN CONTROL REFERENCE | 3824124 |