| VALLEY-TODECO, INC. | 6710 |
| GENERAL MOTORS CORP | 24617 |
| MERCURY AEROSPACE FASTENERS INC | 50945 |
| ROLLS-ROYCE CORPORATION | 63005 |
| ALLISON TRANSMISSION, INC. | 73342 |
| THREAD CLASS | 3A |
| THREAD DIRECTION | RIGHT-HAND |
| THREAD LENGTH | 0.625 INCHES MINIMUM AND 0.685 INCHES MAXIMUM |
| FASTENER LENGTH | 1.000 INCHES NOMINAL |
| NOMINAL THREAD DIAMETER | 0.250 INCHES |
| GRIP LENGTH | 0.315 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |
| THREAD QUANTITY PER INCH | 28 |
| MATERIAL | STEEL CORROSION RESISTING OVERALL |
| THREAD SERIES DESIGNATOR | UNF |
| An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. The threaded and unthreaded portions are both of one nominal diameter of .19 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. For items having a grip length portion machined to a tolerance of . 15 inch ( . 38 mm) or less, BOLT, SHEAR. See also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE. |
