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National Stock Number:
5306-01-625-8690
Federal Supply Class:
5306
National Item Identification Number:
016258690
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:
| NAS6210-33X | 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 | 0.6250 INCHES | | THREAD QUANTITY PER INCH | 18 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.626 INCHES NOMINAL | | FASTENER LENGTH | 2.688 INCHES NOMINAL | | MATERIAL | STEEL COMP 4140 OR | | STEEL COMP 4340 OR | | STEEL COMP 8740 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS6349 ASSN STD 1ST MATERIAL RESPONSE OR | | AMS6389 ASSN STD 2ND MATERIAL RESPONSE OR | | AMS6415 ASSN STD 3RD MATERIAL RESPONSE OR | | AMS6484 ASSN STD 4TH MATERIAL RESPONSE OR | | AMS6322 ASSN STD 5TH MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-416, TYPE II, CLASS 2 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | HEXAGON | | HEAD HEIGHT | 0.312 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 0.928 INCHES MINIMUM AND | | 0.940 INCHES MAXIMUM | | GRIP LENGTH | 2.063 INCHES NOMINAL | | GRIP DIAMETER | 0.6386 INCHES MINIMUM AND | | 0.6396 INCHES MAXIMUM | | POINT STYLE | FLAT | | POINT DIAMETER | 0.6120 INCHES MINIMUM AND | | 0.6180 INCHES MAXIMUM | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,CLOSE TOLERANCE |
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