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National Stock Number:
5306-01-609-8782
Federal Supply Class:
5306
National Item Identification Number:
016098782
Description:
BOLT,CLOSE TOLERANCE
Detail:
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see BOLT, SHEAR. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see BOLT, MACHINE.
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Manufacturer Information:
| NAS6208-44 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | | NAS6208-44W | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.528 INCHES NOMINAL | | FASTENER LENGTH | 3.263 INCHES MINIMUM AND | | 3.293 INCHES MAXIMUM | | MATERIAL | STEEL COMP 4140 OR | | STEEL COMP 4340 OR | | STEEL COMP 8740 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS6349 OR AMS6382 NATIONAL STD/SPEC 1ST MATERIAL RESPONSE OR | | AMS6415 OR AMS6484 NATIONAL STD/SPEC 2ND MATERIAL RESPONSE OR | | AMS6322 NATIONAL STD/SPEC 3RD MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416,TY II,CL 2 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | HEXAGON | | HEAD HEIGHT | 0.250 INCHES MINIMUM AND | | 0.265 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.745 INCHES MINIMUM AND | | 0.752 INCHES MAXIMUM | | GRIP LENGTH | 2.74 INCHES MINIMUM AND | | 2.76 INCHES MAXIMUM | | GRIP DIAMETER | 0.4985 INCHES MINIMUM AND | | 0.4995 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES THREADS | | POINT STYLE | FLAT | | POINT DIAMETER | 0.4880 INCHES MINIMUM AND | | 0.4930 INCHES MAXIMUM | | SPECIAL FEATURES | USED ON THE ADVANCED CARGO PARACHUTE SYSTEM COUPLING ASSEMBLY | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,TENSION,HEX HEAD,CLOSE TOLERANCE,ALLOY STEEL,SHORT THREAD,REDUCED MAJOR THREAD DIA.,SELF-LOCKING AND NON-LOCKING,160 KSI FTU |
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