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National Stock Number:
5306-00-221-7427
Federal Supply Class:
5306
National Item Identification Number:
002217427
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:
| 12P12071-7 | 81755 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.550 INCHES NOMINAL FIRST HOLE | | EXTENDED WASHER DIAMETER | 0.823 INCHES NOMINAL | | EXTENDED WASHER THICKNESS | 0.123 INCHES NOMINAL | | FASTENER LENGTH | 3.011 INCHES NOMINAL | | FEATURES PROVIDED | UNFINISHED HEAD | | GRIP LENGTH | 2.250 INCHES NOMINAL | | HARDNESS RATING | 46.0 ROCKWELL C MINIMUM OVERALL AND 50.0 ROCKWELL C MAXIMUM OVERALL | | HEAD HEIGHT | 0.504 INCHES NOMINAL | | HEAD STYLE | DOUBLE HEXAGON W/HOLE | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | MATERIAL | STEEL OVERALL | | MINIMUM TENSILE STRENGTH | 220000 POUNDS PER SQUARE INCH | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES NOMINAL FIRST HOLE | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.761 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 20 | | WIDTH BETWEEN FLATS | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL |
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