1660-01-521-5120 DUCT ASSEMBLY,AIR CONDITIONING-H Index 1680-01-521-5122 FOAM INSULATION-BALLISTIC,RIGID

National Stock Number:
5305-01-521-5121

Federal Supply Class:
5305

National Item Identification Number:
015215121

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:
BACS12HW3T206725SPS TECHNOLOGIES, LLC
BACS12HW3T20ZC92HEARTLAND PRECISION FASTENERS INC
BACS12HW3T21GP79PILGRIM SCREW CORP
BACS12HW3T281205THE BOEING COMPANY


Techincal Specification:
CRITICALITY CODE JUSTIFICATIONAGAV
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW,CLOSE TOLERAN


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