| MATERIAL | STEEL COMP 631 SPRING |
| III PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, PAN HEAD, POSITIVE LOCKING, NICKEL ALLOY 718 |
| PROPRIETARY CHARACTERISTICS | PACS |
| NOMINAL THREAD DIAMETER | 0.3125 INCHES |
| SPLINE MAJOR DIAMETER | 0.221 INCHES NOMINAL |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD QUANTITY PER INCH | 24 |
| THREAD SERIES DESIGNATOR | UNJF |
| FASTENER LENGTH | 2.313 INCHES MINIMUM AND 2.329 INCHES MAXIMUM |
| GRIP LENGTH | 2.313 INCHES NOMINAL |
| HEAD HEIGHT | 0.165 INCHES MINIMUM AND 0.180 INCHES MAXIMUM |
| HEAD DIAMETER | 0.610 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| HEAD STYLE | FILLISTER COUNTERSUNK |
| INTERNAL DRIVE STYLE | TORX |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5962 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM A581 ASSN STD SINGLE MATERIAL RESPONSE LOCKING FEATURE |
| MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5678 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM-A-313 ASSN STD SINGLE MATERIAL RESPONSE SPRING |
| MATERIAL | NICKEL ALLOY 718 FASTENER |
| MATERIAL | STEEL COMP 440C LOCKING FEATURE |