| THREAD SERIES DESIGNATOR | UNC |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.345 INCHES MINIMUM AND |
| 0.437 INCHES MAXIMUM |
| FASTENER LENGTH | 0.407 INCHES MINIMUM AND |
| 0.437 INCHES MAXIMUM |
| MATERIAL | STEEL CORROSION RESISTING PRIMARY WASHER |
| STEEL COMP 302 FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| SURFACE TREATMENT | PLASTIC EPOXY HEAD |
| PLASTIC EPOXY PRIMARY WASHER |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | 595 FED STD SINGLE TREATMENT RESPONSE HEAD |
| 595 FED STD SINGLE TREATMENT RESPONSE PRIMARY WASHER |
| HEAD STYLE | ROUND |
| HEAD DIAMETER | 0.270 INCHES MAXIMUM |
| HEAD HEIGHT | 0.103 INCHES MAXIMUM |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FLAT |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.360 INCHES MAXIMUM |
| PRIMARY WASHER MATERIAL THICKNESS | 0.053 INCHES MAXIMUM |
| SPECIAL FEATURES | COLOR BLACK; FURNISH ONE CUSHION MADE OF NEOPRENE MATERIAL |