5305-01-262-7885, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-262-7885

Federal Supply Class:
5305

National Item Identification Number:
012627885

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:

MS3369B-626

96906

MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.375 INCHES
THREAD QUANTITY PER INCH	24
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.352 INCHES MINIMUM AND
	0.403 INCHES MAXIMUM
FASTENER LENGTH	2.164 INCHES MINIMUM AND
	2.184 INCHES MAXIMUM
MATERIAL	STEEL CORROSION RESISTING LOCKING FEATURE
	STEEL COMP 631 OR
	STEEL COMP 302 SPRING
	STEEL COMP XM-13 FASTENER
MATERIAL DOCUMENT AND CLASSIFICATION	QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE
	AMS 5673 ASSN STD 1ST MATERIAL RESPONSE OR
	ASTM A580 ASSN STD 2ND MATERIAL RESPONSE SPRING
	AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE FASTENER
SURFACE TREATMENT	PASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING	50.0 ROCKWELL C MINIMUM AND
	62.0 ROCKWELL C MAXIMUM LOCKING FEATURE
MINIMUM TENSILE STRENGTH	63000 POUNDS PER SQUARE INCH
HEAD STYLE	CROWNED HEXAGON
HEAD HEIGHT	0.189 INCHES MINIMUM AND
	0.204 INCHES MAXIMUM
WIDTH BETWEEN FLATS	0.553 INCHES MINIMUM AND
	0.564 INCHES MAXIMUM
INTERNAL DRIVE STYLE	SLOT
LOCKING FEATURE	DETENT BALL GRIP
GRIP LENGTH	1.625 INCHES MINIMUM AND
	1.641 INCHES MAXIMUM
GRIP DIAMETER	0.3737 INCHES MINIMUM AND
	0.3742 INCHES MAXIMUM
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
	32.0 MICROINCHES GRIP
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	2.036 INCHES MINIMUM AND
	2.056 INCHES MAXIMUM FIRST HOLE
SHANK UNTHREADED HOLE DIAMETER	0.106 INCHES MINIMUM AND
	0.116 INCHES MAXIMUM FIRST HOLE
SPEC/STD CONTROLLING DATA
MANUFACTURERS CODE	96906
DEFINITIVE GOVERNMENT SPEC/STD REFERENCE	MS3369B-626

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