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National Stock Number:
5305-01-621-0918
Federal Supply Class:
5305
National Item Identification Number:
016210918
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:
| 26656A-00 | 2288A | ELBIT SYSTEMS LTD | | 26656A-00 | S0123 | ELBIT SYSTEMS LTD. |
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Techincal Specification:
| COLOR | BLACK OVERALL | | FASTENER LENGTH | 15.9 MILLIMETERS NOMINAL | | GRIP DIAMETER | 1.9 MILLIMETERS MINIMUM AND 2.1 MILLIMETERS MAXIMUM | | GRIP LENGTH | 12.0 MILLIMETERS NOMINAL | | HEAD DIAMETER | 0.176 INCHES MINIMUM AND 0.183 INCHES MAXIMUM | | HEAD HEIGHT | 0.108 INCHES MINIMUM AND 0.112 INCHES MAXIMUM | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | MS16995 MIL STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,CAP,4-40,ALTERED ITEM | | POINT STYLE | FLAT | | POINT DIAMETER | 0.110 INCHES NOMINAL | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD DIAMETER | 0.112 INCHES | | WIDTH ACROSS FLATS | 0.094 INCHES NOMINAL | | SURFACE FINISH | 63.0 MICROINCHES FASTENER | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | BLACK-T CL 2 TY VI IAW VS-1-3-1-165 MFR REF SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | BLACK CHEMICAL FINISH OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 3.9 MILLIMETERS NOMINAL | | THREAD QUANTITY PER INCH | 40 | | THREAD SERIES DESIGNATOR | UNC |
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