| COLOR | BLACK OVERALL |
| FASTENER LENGTH | 1.00 INCHES NOMINAL |
| HEAD HEIGHT | 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE J429 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| NOMINAL THREAD DIAMETER | 0.31 INCHES |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, CAP, HEX, TAB .31 - 18 G5 MB |
| SPECIAL FEATURES | FINISH: PER FM100 D60 TYPE 1 (MAGNIBLACK 575) |
| WIDTH BETWEEN FLATS | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.00 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| THREAD QUANTITY PER INCH | 18 |