5305-01-163-1983, SCREW,CLOSE TOLERANCE

5305-01-163-1982 SCREW,CLOSE TOLERANCE

5940-01-163-1984 TERMINAL,LUG

National Stock Number:
5305-01-163-1983

Federal Supply Class:
5305

National Item Identification Number:
011631983

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:

MS21125A629	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
MS21125A629	96906	MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	2.223 INCHES MINIMUM AND 2.243 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH	2.351 INCHES MINIMUM AND 2.371 INCHES MAXIMUM
GRIP DIAMETER	0.3737 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM
GRIP LENGTH	1.812 INCHES MINIMUM AND 1.828 INCHES MAXIMUM
HEAD DIAMETER	0.722 INCHES MINIMUM AND 0.740 INCHES MAXIMUM
HEAD HEIGHT	0.189 INCHES MINIMUM AND 0.204 INCHES MAXIMUM
HEAD STYLE	PAN NO. 2
INTERNAL DRIVE STYLE	SLOT
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	IRON ALLOY 660 OVERALL
MINIMUM TENSILE STRENGTH	63000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.375 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURES	RETAINING ELEMENT IN SHANK
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH	32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	PASSIVATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.352 INCHES MINIMUM AND 0.403 INCHES MAXIMUM
THREAD QUANTITY PER INCH	24
THREAD SERIES DESIGNATOR	UNJF

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