| FASTENER LENGTH | 0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM |
| HEAD DIAMETER | 0.407 INCHES MINIMUM AND 0.425 INCHES MAXIMUM |
| HEAD HEIGHT | 0.139 INCHES MINIMUM AND 0.151 INCHES MAXIMUM |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| MATERIAL | STEEL COMP 305 OR STEEL COMP 410 OVERALL |
| NOMINAL THREAD DIAMETER | 0.216 INCHES |
| PRIMARY WASHER MATERIAL THICKNESS | 0.063 INCHES NOMINAL |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.414 INCHES MINIMUM AND 0.429 INCHES MAXIMUM |
| PRIMARY WASHER STYLE | SPLIT HELICAL RING |
| SECONDARY WASHER MATERIAL THICKNESS | 0.046 INCHES NOMINAL |
| SECONDARY WASHER OUTSIDE DIAMETER | 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM |
| SECONDARY WASHER STYLE | FLAT |
| SECONDARY WASHER RELATIONSHIP TO PRIMARY WASHER | NOT IDENTICAL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| WASHER QUANTITY | 2 |