| MATERIAL | IRON ALLOY 660 OVERALL |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OR |
| AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| SURFACE TREATMENT | PASSIVATE OVERALL |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | HI-SHEAR SPEC 258,CAGEC 73197 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| SHEAR STRENGTH | 95000 SINGLE POUNDS PER SQUARE INCH |
| HEAD HEIGHT | 0.068 INCHES MINIMUM AND |
| 0.078 INCHES MAXIMUM |
| HEAD MAJOR DIAMETER | 0.475 INCHES MINIMUM AND |
| 0.505 INCHES MAXIMUM |
| SHANK STYLE | PIN-RIVET, STRAIGHT, THREADED |
| FASTENER LENGTH | 1.240 INCHES MINIMUM AND |
| 1.260 INCHES MAXIMUM |
| WIDTH BETWEEN FLATS | 0.1270 INCHES MINIMUM AND |
| 0.1295 INCHES MAXIMUM |
| SHANK DIAMETER | 0.3115 INCHES MINIMUM AND |
| 0.3120 INCHES MAXIMUM |
| GRIP LENGTH | 0.755 INCHES MAXIMUM |
| THREAD SERIES DESIGNATOR | UNJF |
| NOMINAL THREAD SIZE | 0.312 INCHES |
| THREAD CLASS | 3A |
| THREAD QUANTITY PER INCH | 24 |
| THREAD DIRECTION | RIGHT-HAND |
| SPECIAL FEATURES | 0.076 IN. MIN 0.086 IN. MAX DRILLED HOLE 0.234 IN. MIN 0.254 IN. MAX FROM THD END |