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National Stock Number:
5305-01-169-7237
Federal Supply Class:
5305
National Item Identification Number:
011697237
Description:
SCREW,CLOSE TOLERANCE
Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (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 designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.
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Manufacturer Information:
| SS5112-321 | 16258 | SPACE-LOK, INC. | | SS5112-321 | 73197 | HI-SHEAR CORPORATION | | SS5112-321 | 78286 | SIKORSKY AIRCRAFT CORPORATION | | SS5112-321 | 84256 | AVIBANK MFG., INC. | | SS5112-321 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.263 INCHES MINIMUM AND | | 0.314 INCHES MAXIMUM | | FASTENER LENGTH | 1.685 INCHES MINIMUM AND | | 1.705 INCHES MAXIMUM | | MATERIAL | STEEL COMP 630 OR | | STEEL COMP 302 SPRING | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 63000 POUNDS PER SQUARE INCH | | HEAD STYLE | CROWNED HEXAGON | | HEAD HEIGHT | 0.095 INCHES MINIMUM AND | | 0.110 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.367 INCHES MINIMUM AND | | 0.376 INCHES MAXIMUM | | INTERNAL DRIVE STYLE | SLOT | | LOCKING FEATURE | DETENT BALL GRIP | | GRIP LENGTH | 1.312 INCHES MINIMUM AND | | 1.328 INCHES MAXIMUM | | GRIP DIAMETER | 0.1889 INCHES MINIMUM AND | | 0.1894 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.595 INCHES MINIMUM AND | | 1.615 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.070 INCHES MINIMUM AND | | 0.080 INCHES MAXIMUM FIRST HOLE |
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