5305-01-345-8395, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-345-8395

Federal Supply Class:
5305

National Item Identification Number:
013458395

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:

11839V4-7-24	59563	REID PRODUCTS INC.
3M1034V4-7-24	76301	THE BOEING COMPANY
HT4075V4-7-24	06950	HOWMET GLOBAL FASTENING SYSTEMS INC
HT4075V4-7-24	56878	SPS TECHNOLOGIES, LLC
HT4075V4-7-24	73197	HI-SHEAR CORPORATION
3M1034V4-7-24	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
HT4075V4-7-24	92215	HOWMET GLOBAL FASTENING SYSTEMS INC
HT4075V4-7-24	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	0.781 INCHES NOMINAL THREADS
FASTENER LENGTH	0.892 INCHES MINIMUM AND 0.922 INCHES MAXIMUM
GRIP LENGTH	0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM
GRIP DIAMETER	0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
HEAD DIAMETER	0.497 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	HIGH-TORQUE
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS-4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	TITANIUM ALLOY UNS R56400 OVERALL
NOMINAL THREAD DIAMETER	0.250 INCHES
SHANK UNTHREADED HOLE DIAMETER	0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM THREADS
SPECIAL FEATURES	0.138-32UNJC-3B THREADED HOLE, 0.300 IN. MIN AND 0.345IN MAX DEPTH FROM TOP OF HEAD, COUNTERBORE 0.145 IN. MIN AND 0.150 IN. MAX BY 0.055 IN. MIN AND 0.065 IN. MAX DEPTH; PORT 0.060 IN. BY 0.120 IN.
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.398 INCHES MINIMUM AND 0.469 INCHES MAXIMUM
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH	28

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