| COUNTERSINK ANGLE | 129.3 DEGREES MINIMUM AND 130.3 DEGREES MAXIMUM |
| FASTENER LENGTH | 1.028 INCHES MINIMUM AND 1.048 INCHES MAXIMUM |
| GRIP LENGTH | 0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.444 INCHES NOMINAL |
| HEAD STYLE | FLUSH COUNTERSUNK |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL |
| 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 | 9300 DOUBLE POUNDS PER SQUARE INCH |
| SPECIAL FEATURES | S" INDICATES SPLINE LOCK RECESS |
| WIDTH BETWEEN FLATS | 0.132 INCHES NOMINAL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS2486 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PHOSPHATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNJF |
| THREAD QUANTITY PER INCH | 28 |