| THREAD DIRECTION | RIGHT-HAND |
| FASTENER LENGTH | 1.234 INCHES MINIMUM AND |
| 1.281 INCHES MAXIMUM |
| MATERIAL | STEEL COMP 302 OR |
| STEEL COMP 303 OR |
| STEEL COMP 304 OR |
| STEEL COMP 305 OR |
| STEEL COMP 316 OVERALL |
| THREAD LENGTH | 1.250 INCHES NOMINAL |
| HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER |
| THREAD SERIES DESIGNATOR | UNF |
| NOMINAL THREAD DIAMETER | 0.4375 INCHES |
| THREAD QUANTITY PER INCH | 20 |
| THREAD CLASS | 3A |
| MATERIAL DOCUMENT AND CLASSIFICATION | NO.66 OR INTERCHANGEABLE WITH 16:18 ALLOY STEEL FED STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | FF-S-86 FED SPEC SINGLE TREATMENT RESPONSE OR |
| MIL-F-18240 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| HARDNESS RATING | 80.0 ROCKWELL B MINIMUM OVERALL |
| MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.430 INCHES MINIMUM AND |
| 0.437 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND |
| 0.439 INCHES MAXIMUM |
| EXTENDED WASHER DIAMETER | 0.642 INCHES MINIMUM AND |
| 0.656 INCHES MAXIMUM |
| EXTENDED WASHER THICKNESS | 0.146 INCHES MINIMUM AND |
| 0.166 INCHES MAXIMUM |
| SURFACE FINISH | 125.0 MICROINCHES BEARING SURFACE OF HEAD |
| SPECIFICATION/STANDARD DATA | 96906-MS21099(ASG) GOVERNMENT SPECIFICATION |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,SELF LOCKING,CORROSION RESISTING STEEL,80 KSI FTU,250 DEG F,12-POINT,EXTERNAL WRENCHING |
| SPEC/STD CONTROLLING DATA | |
| MANUFACTURERS CODE | 96906 |
| DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS21099-67 |