| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| FASTENER LENGTH | 1.260 INCHES MINIMUM AND 1.280 INCHES MAXIMUM |
| GRIP LENGTH | 0.870 INCHES MINIMUM AND 0.880 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.3898 INCHES MINIMUM AND 0.3948 INCHES MAXIMUM |
| HEAD STYLE | FLUSH COUNTERSUNK |
| LUBRICATION | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | NICKEL ALLOY 718 OVERALL |
| MINIMUM TENSILE STRENGTH | 220000 POUNDS PER SQUARE INCH |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SHANK DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED |
| SHEAR STRENGTH | 125000 SINGLE POUNDS PER SQUARE INCH |
| SPECIAL FEATURES | LIGHT BLUE IDENTIFICATION ON TOP OF HEAD |
| WIDTH BETWEEN FLATS | 0.0947 INCHES MINIMUM AND 0.0967 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | SPEC. 258,CAGEC 73197 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNJF |
| THREAD QUANTITY PER INCH | 28 |