5305-01-030-4658, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-030-4658

Federal Supply Class:
5305

National Item Identification Number:
010304658

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:

HT239-5-11D	73197	HI-SHEAR CORPORATION
HT239-5-11D	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC

Techincal Specification:

DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.934 INCHES MINIMUM AND 0.954 INCHES MAXIMUM FIRST HOLE
COUNTERSINK ANGLE	100.0 DEGREES NOMINAL
CRITICALITY CODE JUSTIFICATION	FEAT
FASTENER LENGTH	1.047 INCHES MINIMUM AND 1.094 INCHES MAXIMUM
GRIP DIAMETER	0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
GRIP LENGTH	0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM
HEAD DIAMETER	0.448 INCHES MINIMUM AND 0.477 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	HIGH-TORQUE
MATERIAL	STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4130 OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.312 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURES	CRIT CODE CHANGED FROM X TO Y FOR CRITICAL FEATURE INCLUDING TOLERANCE
SURFACE FINISH	63.0 MICROINCHES GRIP
SURFACE FINISH	63.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.349 INCHES MINIMUM AND 0.416 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNJF
THREAD QUANTITY PER INCH	24

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