| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS5737 FED SPEC SINGLE MATERIAL RESPONSE OR |
| MS5731 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | HI-SHEAR SPEC 258 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 14000 POUNDS PER SQUARE INCH |
| SHEAR STRENGTH | 21000 DOUBLE POUNDS PER SQUARE INCH |
| HEAD STYLE | STRAIGHT PAN |
| HEAD HEIGHT | 0.130 INCHES MINIMUM AND |
| 0.140 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.530 INCHES MINIMUM AND |
| 0.565 INCHES MAXIMUM |
| SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED |
| FASTENER LENGTH | 1.545 INCHES NOMINAL |
| WIDTH BETWEEN FLATS | 0.197 INCHES MINIMUM AND |
| 0.217 INCHES MAXIMUM |
| SHANK DIAMETER | 0.3740 INCHES MINIMUM AND |
| 0.3745 INCHES MAXIMUM |
| CHAMFER LENGTH | 0.065 INCHES MINIMUM AND |
| 0.075 INCHES MAXIMUM |
| GRIP LENGTH | 0.545 INCHES NOMINAL |
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD SIZE | 0.3750 INCHES |
| THREAD CLASS | E3A |
| THREAD QUANTITY PER INCH | N24 |
| THREAD DIRECTION | RIGHT-HAND |
| LUBRICATION | CETYL ALCOHOL, SPEC 305, HI-SHEAR CORP |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | HI-LOK PIN PROTRUDING HEAD |