5305-01-135-7274 SCREW,CLOSE TOLERANCE Index 5305-01-135-7276 SCREW,CLOSETOLERANCE

National Stock Number:
5305-01-135-7275

Federal Supply Class:
5305

National Item Identification Number:
011357275

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:
106706H-4-A1956878SPS TECHNOLOGIES, LLC
106706H-4-A1980539SPS TECHNOLOGIES, LLC
H148-4-1917446HUCK INTERNATIONAL, INC
GB510BC4-1926512NORTHROP GRUMMAN SYSTEMS CORPORATION
HT8171-4-1992215HOWMET GLOBAL FASTENING SYSTEMS INC
H148-4-1997928HUCK INTL INC


Techincal Specification:
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH1.584 INCHES MINIMUM AND 1.631 INCHES MAXIMUM
GRIP DIAMETER0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
GRIP LENGTH1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER0.447 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLEHIGH-TORQUE
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP H11 OVERALL
MINIMUM TENSILE STRENGTH220000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.250 INCHES
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONNAS 672 ASSN STD 1ST TREATMENT RESPONSE OR MIL-C-8837 TY 2 CL 2 MIL SPEC 2ND TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OR CADMIUM AND CHROMATE OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.386 INCHES MINIMUM AND 0.453 INCHES MAXIMUM
THREAD SERIES DESIGNATORUNJF
THREAD QUANTITY PER INCH28


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