5305-01-310-9251, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-310-9251

Federal Supply Class:
5305

National Item Identification Number:
013109251

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:

11935-3DL10A	59563	REID PRODUCTS INC.
HT4057-3D10A	06950	HOWMET GLOBAL FASTENING SYSTEMS INC
HT4057-3D10A	17446	HUCK INTERNATIONAL, INC
HT4057-3D10A	73197	HI-SHEAR CORPORATION
HT4057-3D10A	80539	SPS TECHNOLOGIES, LLC
HT4057-3D10A	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
ST3M733-3DL10A	76301	THE BOEING COMPANY
HT4057-3D10A	97928	HUCK INTL INC
HT4057-3D10A	L4528	LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.935 INCHES MINIMUM AND 0.995 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH	1.016 INCHES MINIMUM AND 1.046 INCHES MAXIMUM
FEATURES PROVIDED	CETYL ALCOHOL LUBRICANT
GRIP LENGTH	0.615 INCHES MINIMUM AND 0.635 INCHES MAXIMUM
GRIP DIAMETER	0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM
HEAD HEIGHT	0.080 INCHES NOMINAL
HEAD DIAMETER	0.338 INCHES MINIMUM AND 0.381 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK UNDERCUT
INTERNAL DRIVE STYLE	HIGH-TORQUE
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP XM-13 OVERALL
MINIMUM TENSILE STRENGTH	125000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.190 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE
SPECIAL FEATURES	LUBRICANT PER MIL-C-83488,TY 2,CL 3
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-C-83488 TY,2,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	ALUMINUM AND CHROMATE OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.381 INCHES MINIMUM AND 0.431 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH	32

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