| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.473 INCHES MINIMUM AND |
| 0.540 INCHES MAXIMUM |
| FASTENER LENGTH | 1.078 INCHES MINIMUM AND |
| 1.125 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 1030 PRIMARY WASHER |
| STEEL COMP 1022 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD 2ND MATERIAL RESPONSE PRIMARY WASHER |
| SAE ASSN STD 1ST MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | CADMIUM PRIMARY WASHER |
| CADMIUM FASTENER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | GM4341-M CODE 15 FSCM16764 MFR REF 2ND TREATMENT RESPONSE PRIMARY WASHER |
| GM4341-M CODE 15 FSCM16764 MFR REF 1ST TREATMENT RESPONSE FASTENER |
| HARDNESS RATING | 44.0 ROCKWELL C MINIMUM AND |
| 48.0 ROCKWELL C MAXIMUM PRIMARY WASHER |
| HEAD STYLE | HEXAGON EXTENDED WASHER |
| HEAD HEIGHT | 0.120 INCHES MINIMUM AND |
| 0.136 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.244 INCHES MINIMUM AND |
| 0.250 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.358 INCHES MINIMUM AND |
| 0.380 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.019 INCHES MINIMUM AND |
| 0.031 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | W/O INTERNAL DRIVE |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FINISHING |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.370 INCHES MINIMUM AND |
| 0.380 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.025 INCHES NOMINAL |
| THE MANUFACTURERS DATA | |
| MANUFACTURERS CODE | 10988 |
| DESIGN CONTROL REFERENCE | A45221 |