| COLOR | BLACK OVERALL |
| FASTENER LENGTH | 0.72 INCHES MINIMUM AND 0.75 INCHES MAXIMUM |
| HARDNESS RATING | 28.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| HEAD HEIGHT | 0.172 INCHES MINIMUM AND 0.190 INCHES MAXIMUM |
| HEAD STYLE | HEXAGON |
| INTERNAL DRIVE STYLE | HEXAGON |
| MATERIAL DOCUMENT AND CLASSIFICATION | SAE 1022 NATIONAL STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 1022 OVERALL |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,THREAD FORMING |
| PROPRIETARY CHARACTERISTICS | PACS |
| NONMACHINE NOMINAL THREAD DIAMETER | 0.250 INCHES |
| NONMACHINE THREAD STYLE | SELF DRILLING |
| WIDTH ACROSS FLATS | 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.409 INCHES MINIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MILLER SPEC 168469 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | ZINC OVERALL |