| COLOR | BLACK OVERALL |
| FASTENER LENGTH | 1.190 INCHES MINIMUM AND 1.310 INCHES MAXIMUM |
| HEAD DIAMETER | 0.421 INCHES MINIMUM AND 0.430 INCHES MAXIMUM |
| HEAD HEIGHT | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM |
| HEAD STYLE | BUTTON |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | ASTM F835 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL OVERALL |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| WIDTH ACROSS FLATS | 0.100 INCHES MINIMUM AND 0.220 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | D60, TYPE 1 F-100 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC AND PHOSPHATE OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.190 INCHES MINIMUM AND 1.310 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 20 |
| THREAD SERIES DESIGNATOR | UNC |