5306-01-167-1088 BOLT,CLOSE TOLERANCE Index 5305-01-167-1090 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-167-1089

Federal Supply Class:
5305

National Item Identification Number:
011671089

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:
BACB30LR481205THE BOEING COMPANY
BACB30LR4-806710VALLEY-TODECO, INC.
BACB30LR4-806725SPS TECHNOLOGIES, LLC
BACB30LR4-806950HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LR4-817446HUCK INTERNATIONAL, INC
BACB30LR4-817943FEDERAL MANUFACTURING CORP
BACB30LR4-81RC86HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LR4-827624SPS TECHNOLOGIES LLC
BACB30LR4-856878SPS TECHNOLOGIES, LLC
BACB30LR4-880539SPS TECHNOLOGIES, LLC
BACB30LR4-881205THE BOEING COMPANY
BACB30LR4-892215HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LR4-897928HUCK INTL INC
BACB30LR4-8FAWT4BLANC AERO INDUSTRIE VILLEFRANCHE DEROUERGUE - GROUPE LISI AEROSPACE


Techincal Specification:
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM
GRIP DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
GRIP LENGTH0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
HEAD DIAMETER0.455 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALIRON ALLOY 660 OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TY 2,CL 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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