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National Stock Number:
5306-01-617-3813
Federal Supply Class:
5306
National Item Identification Number:
016173813
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:
| NAS6204P5 | 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 | | THREAD QUANTITY PER INCH | 28 | | THREAD DIRECTION | RIGHT-HAND | | FASTENER LENGTH | 0.667 INCHES MINIMUM AND | | 0.697 INCHES MAXIMUM | | MATERIAL | STEEL COMP 4140 OR | | STEEL COMP 4340 OR | | STEEL COMP 8740 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-DTL-18240 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE | | HEAD STYLE | HEXAGON | | HEAD DIAMETER | 0.249 INCHES MINIMUM AND | | 0.250 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.429 INCHES MINIMUM AND | | 0.439 INCHES MAXIMUM | | LOCKING FEATURE | SELF-LOCKING FASTENER | | GRIP LENGTH | 0.302 INCHES MINIMUM AND | | 0.322 INCHES MAXIMUM | | GRIP DIAMETER | 0.398 INCHES NOMINAL | | SPECIAL FEATURES | AS8879;SHORT THREAD;PATCH TYPE FINISH;0.398 GRIP DIAMETER;160 KSI FTU | | SPECIFICATION/STANDARD DATA | 80205-NAS6203THRU6220 MANUFACTURERS SPECIFICATION | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,TENSION,HEX HEAD,CLOSE TOLERANCE |
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