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National Stock Number:
5306-01-391-3657
Federal Supply Class:
5306
National Item Identification Number:
013913657
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:
| 1/4-20UNC-2A X 3/4 LG STL | 53711 | NAVAL SEA SYSTEMS COMMAND | | 1/4-20UNC-2AX0.75LG SQ HD BOLT | 06888 | L A BENSON COMPANY INCORPORATED THE |
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Techincal Specification:
| THREAD DIRECTION | RIGHT-HAND | | FASTENER LENGTH | 0.750 INCHES NOMINAL | | MATERIAL | STEEL OVERALL | | THREAD LENGTH | 0.650 INCHES MINIMUM AND | | 0.750 INCHES MAXIMUM | | HEAD STYLE | SQUARE | | THREAD SERIES DESIGNATOR | UNC | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 2A | | MATERIAL DOCUMENT AND CLASSIFICATION | SAE J429, GRADE 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD HEIGHT | 0.156 INCHES MINIMUM AND | | 0.188 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.362 INCHES MINIMUM AND | | 0.375 INCHES MAXIMUM |
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