5305-01-166-6139 SCREW,CLOSE TOLERANCE Index 5305-01-166-6141 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-166-6140

Federal Supply Class:
5305

National Item Identification Number:
011666140

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.


Manufacturer Information:
BACB30LU4-2106710VALLEY-TODECO, INC.
BACB30LU4-2106725SPS TECHNOLOGIES, LLC
BACB30LU4-2106950HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LU4-2117446HUCK INTERNATIONAL, INC
BACB30LU4-2117943FEDERAL MANUFACTURING CORP
BACB30LU4-211RC86HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LU4-2127624SPS TECHNOLOGIES LLC
BACB30LU4-2156878SPS TECHNOLOGIES, LLC
BACB30LU4-2180539SPS TECHNOLOGIES, LLC
BACB30LU4-2181205THE BOEING COMPANY
BACB30LU4-2192215HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LU4-2197928HUCK INTL INC


Techincal Specification:
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH1.722 INCHES MINIMUM AND 1.752 INCHES MAXIMUM
GRIP DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
GRIP LENGTH1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM
HEAD DIAMETER0.455 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP E4340 OR STEEL COMP 8740 OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM
THREAD SERIES DESIGNATORUNJF
THREAD QUANTITY PER INCH28


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