| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| FASTENER LENGTH | 2.072 INCHES MINIMUM AND 2.092 INCHES MAXIMUM |
| GRIP LENGTH | 1.682 INCHES MINIMUM AND 1.692 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.4210 INCHES MINIMUM AND 0.4260 INCHES MAXIMUM |
| HEAD STYLE | FLUSH COUNTERSUNK |
| MATERIAL | STEEL OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SHANK DIAMETER | 0.2797 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM |
| SHEAR STRENGTH | 95000 SINGLE POUNDS PER SQUARE INCH |
| SPECIFICATION/STANDARD DATA | 73197-HL220-8-27 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYII,CL3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | CADMIUM OVERALL |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD CLASS | 3A |
| THREAD SERIES DESIGNATOR | UNJF |
| THREAD QUANTITY PER INCH | 28 |