| THREAD SERIES DESIGNATOR | M | 
| NOMINAL THREAD DIAMETER | 20.0 MILLIMETERS | 
| THREAD PITCH IN MILLIMETERS | 1.5 | 
| EXTERNAL THREAD TOLERANCE CLASS | 4H | 
| THREAD DIRECTION | RIGHT-HAND | 
| THREAD LENGTH | 33.50 MILLIMETERS MINIMUM AND | 
|  | 34.50 MILLIMETERS MAXIMUM | 
| FASTENER LENGTH | 78.75 MILLIMETERS MINIMUM AND | 
|  | 79.25 MILLIMETERS MAXIMUM | 
| MATERIAL | IRON ALLOY 660 OVERALL | 
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR | 
|  | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | 
| SURFACE TREATMENT | PASSIVATE OVERALL | 
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | 
| MINIMUM TENSILE STRENGTH | 1100 MEGAPASCALS | 
| HEAD STYLE | HEXAGON | 
| HEAD HEIGHT | 13.19 MILLIMETERS MINIMUM AND | 
|  | 13.63 MILLIMETERS MAXIMUM | 
| WIDTH BETWEEN FLATS | 29.67 MILLIMETERS MINIMUM AND | 
|  | 30.00 MILLIMETERS MAXIMUM | 
| GRIP LENGTH | 44.75 MILLIMETERS MINIMUM AND | 
|  | 45.25 MILLIMETERS MAXIMUM | 
| GRIP DIAMETER | 19.979 MILLIMETERS MINIMUM AND | 
|  | 20.000 MILLIMETERS MAXIMUM | 
| SURFACE FINISH | 0.8 MICROMETERS GRIP | 
| PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |