5305-01-069-5986 SCREW,CLOSE TOLERANCE Index 5940-01-069-5988 TERMINAL,STUD

National Stock Number:
5305-01-069-5987

Federal Supply Class:
5305

National Item Identification Number:
010695987

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:
NAS1164-8L30889ERIKS SOUTHWEST INC DBA MONTCLAIR ENTERPRISES
NAS1164-8L73197HI-SHEAR CORPORATION
NAS1164-8LL4528LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC


Techincal Specification:
FASTENER LENGTH0.910 INCHES MINIMUM AND 0.940 INCHES MAXIMUM
GRIP LENGTH0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLEOFFSET CRUCIFORM (TORQUE SET)
MATERIALSTEEL COMP 4140 OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUN


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