5310-00-061-9126 WASHER,KEYWAY Index 5950-00-061-9128 TRANSFORMER,POWER

National Stock Number:
5305-00-061-9127

Federal Supply Class:
5305

National Item Identification Number:
000619127

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:
AS104-04-784256AVIBANK MFG., INC.
CA2730-4-729372HOWMET GLOBAL FASTENING SYSTEMS INC.
CC00035-4-781755LOCKHEED MARTIN CORPORATION


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER0.557 INCHES NOMINAL FIRST HOLE
FASTENER LENGTH0.896 INCHES NOMINAL
GRIP DIAMETER0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
GRIP LENGTH0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM
HEAD DIAMETER0.3737 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM
HEAD HEIGHT0.253 INCHES MINIMUM AND 0.273 INCHES MAXIMUM
HEAD STYLEFLAT CHAMFER
SHANK UNTHREADED HOLE DIAMETER0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURESRETAINING ELEMENTS IN SHANK
WIDTH ACROSS FLATS0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM
SURFACE FINISH32.0 MICROINCHES OVERALL
THREAD CLASS3A
THREAD LENGTH0.290 INCHES NOMINAL


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