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National Stock Number:
5305-01-288-7851
Federal Supply Class:
5305
National Item Identification Number:
012887851
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:
| 121754-7-27 | 56878 | SPS TECHNOLOGIES, LLC | | 121754-7-27 | 80539 | SPS TECHNOLOGIES, LLC | | AIC9535-7-27 | 06725 | SPS TECHNOLOGIES, LLC | | PBF1198-7-27 | 27624 | SPS TECHNOLOGIES LLC | | C9535-7-27 | 81755 | LOCKHEED MARTIN CORPORATION | | 5305PL0784863 | 9009H | INSPEKTORAT WSPARCIA SIL ZBROJNYCH | | SC1776-7-27 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | VT1696-7-27 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | SF120-7-27 | 0K6Z0 | SATURN FASTENERS INC | | VT1696-7-27 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.668 INCHES MINIMUM AND | | 0.698 INCHES MAXIMUM | | FASTENER LENGTH | 2.332 INCHES MINIMUM AND | | 2.382 INCHES MAXIMUM | | MATERIAL | STEEL COMP H11 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLUSH | | HEAD DIAMETER | 0.615 INCHES MINIMUM AND | | 0.898 INCHES MAXIMUM | | HEAD HEIGHT | 0.195 INCHES NOMINAL | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | GRIP LENGTH | 1.664 INCHES MINIMUM AND | | 1.684 INCHES MAXIMUM | | GRIP DIAMETER | 0.4360 INCHES MINIMUM AND | | 0.4370 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS |
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