| FASTENER LENGTH | 3.156 INCHES MINIMUM AND 3.250 INCHES MAXIMUM |
| HEAD DIAMETER | 0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM |
| HEAD HEIGHT | 0.105 INCHES MINIMUM AND 0.115 INCHES MAXIMUM |
| HEAD STYLE | PAN |
| INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MINIMUM TENSILE STRENGTH | 60000 POUNDS PER SQUARE INCH |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,MACHINE,PAN HEAD,CROSS-RECESSED |
| NOMINAL THREAD DIAMETER | 0.164 INCHES |
| SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633-78, TYPE II FED SPEC SINGLE TREATMENT RESPONSE |
| SCREW MATERIAL | STEEL |
| SCREW SURFACE TREATMENT | ZINC |
| SPECIFICATION/STANDARD DATA | NAS-35206 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| THREAD CLASS | 2A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.750 INCHES MINIMUM |
| THREAD QUANTITY PER INCH | 32 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) |
| SPECIAL FEATURES | TENSILE STRENGTH LBF MIN 1050.0 |