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National Stock Number:
5306-00-297-8726
Federal Supply Class:
5306
National Item Identification Number:
002978726
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:
| FFB571TYPEB3 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
| THREAD DIRECTION | RIGHT-HAND | | FASTENER LENGTH | 4.000 INCHES NOMINAL | | MATERIAL | STEEL OVERALL | | THREAD LENGTH | 1.375 INCHES MINIMUM | | HEAD STYLE | HEXAGON | | THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.562 INCHES | | THREAD QUANTITY PER INCH | 12 | | THREAD CLASS | 2A | | SURFACE TREATMENT | PHOSPHATE OVERALL | | HEAD HEIGHT | 0.422 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 0.861 INCHES MINIMUM AND | | 0.875 INCHES MAXIMUM | | GRIP LENGTH | 2.625 INCHES NOMINAL | | NONDEFINITIVE SPEC/STD DATA | B-3 TYPE | | SPEC/STD CONTROLLING DATA | | | MANUFACTURERS CODE | 81348 | | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFB571TYPEB3 |
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