5305-00-877-9304, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-00-877-9304

Federal Supply Class:
5305

National Item Identification Number:
008779304

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:

NAS1202-18	04348	LAWRENCE ENGINEERING AND SUPPLY INC
NAS1202-18	07851	NOR-CAL SUPPLY CO
NAS1202-18	08938	AIR INDUSTRIES CO INC
NAS1202-18	30889	ERIKS SOUTHWEST INC DBA MONTCLAIR ENTERPRISES
NAS1202-18	30902	F AND C SALES INC
NAS1202-18	50568	APCOM INC
NAS1202-18	56878	SPS TECHNOLOGIES, LLC
NAS1202-18	71563	COLLINS ENGINEERING CORP
NAS1202-18	73197	HI-SHEAR CORPORATION
NAS1202-18	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
NAS1202-18	80539	SPS TECHNOLOGIES, LLC
NAS1202-18	82172	DURHAM AIRCRAFT SERVICE INC
NAS1202-18	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJC
NOMINAL THREAD DIAMETER	0.164 INCHES
THREAD QUANTITY PER INCH	32
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.251 INCHES MINIMUM AND
	0.301 INCHES MAXIMUM
FASTENER LENGTH	1.386 INCHES MINIMUM AND
	1.416 INCHES MAXIMUM
MATERIAL	STEEL COMP E4340 OR
	STEEL COMP 8740 OR
	STEEL COMP 8735 OR
	STEEL COMP 6150 OR
	STEEL COMP 4140 OR
	STEEL COMP 4037 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR
	MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR
	MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR
	MIL-S-8503 MIL SPEC 4TH MATERIAL RESPONSE OR
	MIL-S-5626 MIL SPEC 5TH MATERIAL RESPONSE OR
	AMS 6300 ASSN STD 6TH MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND
	CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND
	42.0 ROCKWELL C MAXIMUM OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
HEAD STYLE	FLAT COUNTERSUNK
HEAD DIAMETER	0.280 INCHES MINIMUM AND
	0.337 INCHES MAXIMUM
COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND
	101.0 DEGREES MAXIMUM
INTERNAL DRIVE STYLE	CROSS RECESS TYPE 1
GRIP LENGTH	1.115 INCHES MINIMUM AND
	1.135 INCHES MAXIMUM
GRIP DIAMETER	0.1625 INCHES MINIMUM AND
	0.1635 INCHES MAXIMUM
SPECIAL FEATURES	FLEET BALLISTIC MISSILE QUALITY AS IDENTIFIED BY QUALITY CONTROL NO. POSO911197
DEPARTURE FROM CITED DESIGNATOR	AS MODIFIED BY SPECIAL FEATURES

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