5305-01-626-8204, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-626-8204

Federal Supply Class:
5305

National Item Identification Number:
016268204

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:

3M938-3-7-5	76301	THE BOEING COMPANY
HT4072-3-7-5	06950	HOWMET GLOBAL FASTENING SYSTEMS INC
HT4072-3-7-5	17446	HUCK INTERNATIONAL, INC
HT4072-3-7-5	73197	HI-SHEAR CORPORATION
HT4072-3-7-5	80539	SPS TECHNOLOGIES, LLC

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER	0.629 INCHES MINIMUM AND 0.639 INCHES MAXIMUM OVERALL
FASTENER LENGTH	0.750 INCHES NOMINAL
GRIP LENGTH	0.438 INCHES NOMINAL
GRIP DIAMETER	0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM
HEAD HEIGHT	0.056 INCHES MINIMUM AND 0.060 INCHES MAXIMUM
HEAD DIAMETER	0.2966 INCHES MINIMUM AND 0.3016 INCHES MAXIMUM
HEAD STYLE	OVAL COUNTERSUNK UNDERCUT
INTERNAL DRIVE STYLE	HIGH-TORQUE
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 5629 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP XM-13 OVERALL
NOMINAL THREAD DIAMETER	0.1900 INCHES
PART NAME ASSIGNED BY CONTROLLING AGENCY	SCREW, MACHINE, 100 DEG C'SUNK, HI-TORQUE, REDUCED HEAD
SHANK UNTHREADED HOLE DIAMETER	0.070 INCHES MINIMUM AND 0.075 INCHES MAXIMUM OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	MIL-C-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	ALUMINUM OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.312 INCHES NOMINAL
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH	32

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