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National Stock Number:
5306-01-368-3704
Federal Supply Class:
5306
National Item Identification Number:
013683704
Description:
BOLT,MACHINE
Detail:
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 0.190 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 0.0015 inch (0.038 mm) or less, BOLT, SHEAR. See also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE.
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Manufacturer Information:
| AS48511 | 9V278 | ROLLS-ROYCE INC | | AS48511 | K0378 | ROLLS-ROYCE PLC | | AS48511 | K0680 | ROLLS-ROYCE AIRLINES | | AS48511 | K7766 | BRITISH STANDARDS INSTITUTION |
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Techincal Specification:
| THREAD DIRECTION | RIGHT-HAND | | FASTENER LENGTH | 0.609 INCHES NOMINAL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | THREAD LENGTH | 0.688 INCHES NOMINAL | | HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER | | THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND | | 45.0 ROCKWELL C MAXIMUM OVERALL | | HEAD HEIGHT | 0.300 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 0.312 INCHES NOMINAL | | EXTENDED WASHER DIAMETER | 0.438 INCHES NOMINAL | | EXTENDED WASHER THICKNESS | 0.060 INCHES NOMINAL | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES THREADS | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.099 INCHES NOMINAL FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.222 INCHES MINIMUM AND | | 0.232 INCHES MAXIMUM FIRST HOLE |
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