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National Stock Number:
5305-01-007-0474
Federal Supply Class:
5305
National Item Identification Number:
010070474
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:
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.960 INCHES NOMINAL FIRST HOLE | | FASTENER LENGTH | 1.070 INCHES NOMINAL | | GRIP LENGTH | 0.750 INCHES NOMINAL | | GRIP DIAMETER | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | HEAD HEIGHT | 0.095 INCHES MINIMUM AND 0.105 INCHES MAXIMUM | | HEAD DIAMETER | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | SLOT | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-862 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 324 OVERALL | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.077 INCHES MINIMUM AND 0.082 INCHES MAXIMUM FIRST HOLE | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | E+1204 FSCM 28652 MFR REF SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.320 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNF |
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