2530-00-512-6194 RING Index 5305-00-512-6203 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-00-512-6200

Federal Supply Class:
5305

National Item Identification Number:
005126200

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:
AS126-4-1684256AVIBANK MFG., INC.
CA2654-4-1629372HOWMET GLOBAL FASTENING SYSTEMS INC.


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER1.333 INCHES MINIMUM FIRST HOLE AND 1.349 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH1.418 INCHES MINIMUM AND 1.438 INCHES MAXIMUM
GRIP DIAMETER0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
GRIP LENGTH1.000 INCHES MINIMUM AND 1.016 INCHES MAXIMUM
HEAD HEIGHT0.126 INCHES MINIMUM AND 0.141 INCHES MAXIMUM
HEAD DIAMETER0.477 INCHES MINIMUM AND 0.492 INCHES MAXIMUM
HEAD STYLEPAN NO. 2
INTERNAL DRIVE STYLESLOT
MATERIALSTEEL OVERALL
PROPRIETARY CHARACTERISTICSPACS
MINIMUM TENSILE STRENGTH160000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.250 INCHES
SHANK UNTHREADED HOLE DIAMETER0.076 INCHES MINIMUM FIRST HOLE AND 0.086 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURESRETAINING BALLS IN SHANK
SURFACE FINISH63.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH63.0 MICROINCHES GRIP
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.277 INCHES MINIMUM AND 0.328 INCHES MAXIMUM
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNJF


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