| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL |
| FASTENER LENGTH | 1.395 INCHES MAXIMUM |
| GRIP LENGTH | 0.375 INCHES NOMINAL |
| HEAD MAJOR DIAMETER | 0.390 INCHES MINIMUM AND 0.395 INCHES MAXIMUM |
| HEAD STYLE | FLUSH COUNTERSUNK |
| LUBRICATION | CETYL ALCOHOL |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | HI-LOK PIN |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5628 TY 431 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| MATERIAL | STEEL COMP 431 OVERALL |
| MINIMUM TENSILE STRENGTH | 4400 POUNDS PER SQUARE INCH |
| NOMINAL THREAD SIZE | 0.250 INCHES |
| SPECIAL FEATURES | 125000 PSI SHEAR MINIMUM HEAT TREATMENT |
| SHANK DIAMETER | 0.249 INCHES MAXIMUM |
| SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED |
| SHEAR STRENGTH | 12260 DOUBLE POUNDS PER SQUARE INCH |
| WIDTH BETWEEN FLATS | 0.947 INCHES MINIMUM AND 0.967 INCHES MAXIMUM |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | HI SHEAR SPEC 258 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD SERIES DESIGNATOR | UNJF |
| THREAD QUANTITY PER INCH | 28 |