5306-01-069-9275 BOLT,CLOSE TOLERANCE Index 5305-01-069-9278 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-069-9277

Federal Supply Class:
5305

National Item Identification Number:
010699277

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:
BACB30LU6D706710VALLEY-TODECO, INC.
BACB30LU6D706725SPS TECHNOLOGIES, LLC
BACB30LU6D706950HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LU6D717446HUCK INTERNATIONAL, INC
BACB30LU6D717943FEDERAL MANUFACTURING CORP
BACB30LU6D727624SPS TECHNOLOGIES LLC
BACB30LU6D757928SONIC INDUSTRIES, INC.
BACB30LU6D780539SPS TECHNOLOGIES, LLC
BACB30LU6D781205THE BOEING COMPANY
BACB30LU6D792215HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LU6D797928HUCK INTL INC


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER0.794 INCHES MINIMUM AND 0.844 INCHES MAXIMUM FIRST HOLE
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH1.001 INCHES MINIMUM AND 1.031 INCHES MAXIMUM
GRIP DIAMETER0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM
GRIP LENGTH0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM
HEAD DIAMETER0.691 INCHES MINIMUM AND 0.765 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 4340 OR STEEL COMP 8740 OVERALL
NOMINAL THREAD DIAMETER0.375 INCHES
SHANK UNTHREADED HOLE DIAMETER0.187 INCHES MINIMUM AND 0.207 INCHES MAXIMUM FIRST HOLE
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 LENGTH0.553 INCHES MINIMUM AND 0.603 INCHES MAXIMUM
THREAD QUANTITY PER INCH24
THREAD SERIES DESIGNATORUNJF


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