5305-01-043-0016, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-043-0016

Federal Supply Class:
5305

National Item Identification Number:
010430016

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:

NAS333P4

80205

NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJF
NOMINAL THREAD DIAMETER	0.190 INCHES
THREAD QUANTITY PER INCH	32
THREAD CLASS	3A
FASTENER LENGTH	0.515 INCHES MINIMUM AND
	0.562 INCHES MAXIMUM
MATERIAL	STEEL COMP E4340 OR
	STEEL COMP 4140 OR
	STEEL COMP 8740 OR
	STEEL COMP 8735 OR
	STEEL COMP 6150 OVERALL
SURFACE TREATMENT	CADMIUM AND
	CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND
	40.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
HEAD STYLE	FLAT COUNTERSUNK
HEAD DIAMETER	0.376 INCHES MINIMUM AND
	0.385 INCHES MAXIMUM
COUNTERSINK ANGLE	100.0 DEGREES NOMINAL
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
GRIP LENGTH	0.115 INCHES MINIMUM AND
	0.135 INCHES MAXIMUM
GRIP DIAMETER	0.1885 INCHES MINIMUM AND
	0.1894 INCHES MAXIMUM
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.382 INCHES MINIMUM AND
	0.402 INCHES MAXIMUM FIRST HOLE
SHANK UNTHREADED HOLE DIAMETER	0.070 INCHES NOMINAL FIRST HOLE
SPECIFICATION/STANDARD DATA	80205-NAS333 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
PART NAME ASSIGNED BY CONTROLLING AGENCY	NAVY SPECIAL PROJECT

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