5305-01-259-1191, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-259-1191

Federal Supply Class:
5305

National Item Identification Number:
012591191

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:

NAS4002	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
NAS5000-22	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE

Techincal Specification:

THREAD SERIES DESIGNATOR	UNJC
NOMINAL THREAD DIAMETER	0.112 INCHES
THREAD QUANTITY PER INCH	40
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.238 INCHES NOMINAL
FASTENER LENGTH	1.598 INCHES MINIMUM AND
	1.628 INCHES MAXIMUM
MATERIAL	STEEL COMP E4340 OR
	STEEL COMP 4340 OR
	STEEL COMP 8740 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5000,G43606 MIL SPEC 1ST MATERIAL RESPONSE OR
	MIL-S-5000,G43400 MIL SPEC 2ND MATERIAL RESPONSE OR
	MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OR
	AMS 6322 ASSN STD 3RD MATERIAL RESPONSE OR
	SAE J404,G87400 ASSN STD 3RD MATERIAL RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM AND
	CHROMATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TYPE 2,CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
HARDNESS RATING	36.0 ROCKWELL C MINIMUM AND
	40.0 ROCKWELL C MAXIMUM OVERALL
HEAD STYLE	PAN NO. 2
HEAD DIAMETER	0.206 INCHES MINIMUM AND
	0.210 INCHES MAXIMUM
HEAD HEIGHT	0.060 INCHES MINIMUM AND
	0.069 INCHES MAXIMUM
INTERNAL DRIVE STYLE	TRI-WING RECESS
GRIP LENGTH	1.365 INCHES MINIMUM AND
	1.385 INCHES MAXIMUM
GRIP DIAMETER	0.110 INCHES MINIMUM AND
	0.112 INCHES MAXIMUM
SURFACE FINISH	32.0 MICROINCHES BEARING SURFACE OF HEAD
	125.0 MICROINCHES SIDES OF HEAD
	125.0 MICROINCHES GRIP
	125.0 MICROINCHES TOP OF HEAD
	32.0 MICROINCHES THREADS
FEATURES PROVIDED	FINISHED HEAD
SPECIFICATION/STANDARD DATA	80205-NAS5000 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NONDEFINITIVE SPEC/STD DATA	3 CLASS AND
	B TYPE AND
	3 TABLE AND
	0.112-40 SIZE
SUPPLEMENTARY FEATURES	TRI-WING RECESS NO. NAS4000-2

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