| FASTENER LENGTH | 1.125 INCHES MINIMUM AND 1.187 INCHES MAXIMUM |
| HEAD HEIGHT | 0.141 INCHES NOMINAL |
| HEAD STYLE | CROWNED HEXAGON |
| LOCKING FEATURE | SLOTTED POINT |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,MACHINE,CROWNED HEXAGON HEAD,ADJUSTING |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5371,5732,5737 OR 5853 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | IRON ALLOY 660 OVERALL |
| NOMINAL THREAD DIAMETER | 0.2500 INCHES |
| WIDTH BETWEEN FLATS | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM |
| SPECIFICATION/STANDARD DATA | 80205-NAS428 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2700,METHOD 1,CLASS 4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 1.125 INCHES MINIMUM AND 1.187 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |