| FASTENER LENGTH | 40.00 MILLIMETERS NOMINAL AND 39.50 MILLIMETERS MINIMUM AND 40.50 MILLIMETERS MAXIMUM |
| HEAD DIAMETER | 17.73 MILLIMETERS MINIMUM AND 18.00 MILLIMETERS MAXIMUM AND 17.73 MILLIMETERS MINIMUM AND 18.27 MILLIMETERS MAXIMUM |
| HEAD HEIGHT | 11.73 MILLIMETERS MINIMUM AND 12.00 MILLIMETERS MAXIMUM AND 11.73 MILLIMETERS MINIMUM AND 12.00 MILLIMETERS MAXIMUM |
| HEAD STYLE | FLAT FILLISTER |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | WFEL F E L S 720 MIL STD SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL |
| NOMINAL THREAD DIAMETER | 12.00 MILLIMETERS |
| SPECIAL FEATURES | HD STYLE RDG C66 KNURLED NO. 1;STRENGTH GRADE 12.9 |
| WIDTH BETWEEN FLATS | 10.025 MILLIMETERS MINIMUM AND 10.115 MILLIMETERS MAXIMUM |
| WIDTH ACROSS FLATS | 4.58 MILLIMETERS NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DEF STAN 03-20 MIL STD 1ST TREATMENT RESPONSE AND DEF STAN 03-33 MIL STD 2ND TREATMENT RESPONSE |
| SURFACE TREATMENT | ZINC AND PASSIVATE |
| THREAD CLASS | 5G6G |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 40.00 MILLIMETERS NOMINAL |
| THREAD SERIES DESIGNATOR | ISO M |
| THREAD PITCH IN MILLIMETERS | 1.75 |