| THREAD SERIES DESIGNATOR | M |
| NOMINAL THREAD DIAMETER | 0.138 INCHES |
| THREAD QUANTITY PER INCH | 32 |
| THREAD PITCH IN MILLIMETERS | 1.0 |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.375 INCHES NOMINAL |
| FASTENER LENGTH | 0.375 INCHES NOMINAL |
| MATERIAL | STEEL OVERALL |
| STEEL COMP 1050 OR |
| STEEL COMP 1053 OR |
| STEEL COMP 1054 OR |
| STEEL COMP 1055 OR |
| STEEL COMP 1059 OR |
| STEEL COMP 1060 PRIMARY WASHER |
| SURFACE TREATMENT | ZINC OVERALL |
| HARDNESS RATING | 60.0 ROCKWELL B NOMINAL OVERALL |
| HEAD STYLE | UNDERCUT PAN NO. 2 |
| HEAD DIAMETER | 0.270 INCHES NOMINAL |
| HEAD HEIGHT | 0.117 INCHES NOMINAL |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE II |
| WASHER QUANTITY | 1 |
| PRIMARY WASHER STYLE | FLAT EXTERNAL TEETH |
| PRIMARY WASHER OUTSIDE DIAMETER | 0.285 INCHES NOMINAL |
| PRIMARY WASHER MATERIAL THICKNESS | 0.020 INCHES NOMINAL |
| SUPPLEMENTARY FEATURES | WASHER MATERIAL CAN BE C1050 TO C1065 STEEL; USE NO 2 DRIVER |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | PAN HEAD PHILLIPS WITH LOCK WASHER-M6 |