| COUNTERSINK ANGLE | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 1.875 INCHES MINIMUM AND 2.125 INCHES MAXIMUM |
| HEAD DIAMETER | 1.219 INCHES MINIMUM |
| HEAD STYLE | FLAT COUNTERSUNK |
| MATERIAL DOCUMENT AND CLASSIFICATION | GM 255-M,CAGEC 24617 MFR REF ALL MATERIAL RESPONSES OVERALL |
| NECK LENGTH | 0.491 INCHES MINIMUM AND 0.541 INCHES MAXIMUM |
| NECK WIDTH | 0.750 INCHES MINIMUM AND 0.765 INCHES MAXIMUM |
| NOMINAL THREAD DIAMETER | 0.750 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.625 INCHES MINIMUM AND 2.125 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNC |
| THREAD QUANTITY PER INCH | 10 |