5340-01-177-5840 PLUG,VENT Index 1560-01-177-5843 COVER,ACCESS,AIRCRAFT

National Stock Number:
5305-01-177-5842

Federal Supply Class:
5305

National Item Identification Number:
011775842

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:
HS4396-3T602731MCDONNELL DOUGLAS HELICOPTER CO INC
HS4396-3T68V613THE BOEING COMPANY
HT295-3-673197HI-SHEAR CORPORATION
HT8163-3-692215HOWMET GLOBAL FASTENING SYSTEMS INC


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