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 | 33.75 MILLIMETERS MINIMUM AND |
| 34.25 MILLIMETERS MAXIMUM |
FASTENER LENGTH | 163.75 MILLIMETERS MINIMUM AND |
| 164.25 MILLIMETERS MAXIMUM |
MATERIAL | IRON ALLOY 660 OVERALL |
MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5732 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 | 12.78 MILLIMETERS MINIMUM AND |
| 13.22 MILLIMETERS MAXIMUM |
WIDTH BETWEEN FLATS | 29.67 MILLIMETERS MINIMUM AND |
| 30.00 MILLIMETERS MAXIMUM |
GRIP LENGTH | 129.75 MILLIMETERS MINIMUM AND |
| 130.25 MILLIMETERS MAXIMUM |
GRIP DIAMETER | 19.979 MILLIMETERS MINIMUM AND |
| 20.000 MILLIMETERS MAXIMUM |
SURFACE FINISH | 3.2 MICROMETERS BEARING SURFACE OF HEAD |
| 3.2 MICROMETERS GRIP |
| 3.2 MICROMETERS THREADS |
PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |