5305-14-512-7741, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-14-512-7741

Federal Supply Class:
5305

National Item Identification Number:
145127741

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:

22258BE052009ME	F0111	BUREAU NORMALISATION AERONAUTIQUEESPACE
22258BE052009ME	F6117	DASSAULT AVIATION
L22258-52-9BEME	F0111	BUREAU NORMALISATION AERONAUTIQUEESPACE

Techincal Specification:

COUNTERSINK ANGLE	100.0 DEGREES NOMINAL
EXTERNAL THREAD TOLERANCE CLASS	4H
FASTENER LENGTH	17.5 MILLIMETERS NOMINAL
GRIP DIAMETER	5.178 MILLIMETERS MINIMUM AND 5.190 MILLIMETERS MAXIMUM
GRIP LENGTH	9.0 MILLIMETERS NOMINAL
HEAD DIAMETER	10.0 MILLIMETERS NOMINAL
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	CROSS RECESS TYPE II
MATERIAL DOCUMENT AND CLASSIFICATION	F3025 AIR 9160C MIL STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	STEEL COMP 30NCD16 OVERALL
NOMINAL THREAD DIAMETER	5.0 MILLIMETERS
SUPPLEMENTARY FEATURES	VIS A DIAMETRE MAJORE POUR REPARATION SUIVANT NF L 22-090
SURFACE FINISH	0.8 MICROMETERS BEARING SURFACE OF HEAD
SURFACE FINISH	0.8 MICROMETERS GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	NF L 09-753 CODE ME NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	CADMIUM THREADS AND CHROMATE THREADS
SURFACE TREATMENT	CADMIUM TOP OF HEAD AND CHROMATE TOP OF HEAD
SURFACE TREATMENT	OIL BEARING SURFACE OF HEAD
SURFACE TREATMENT	OIL GRIP
TEST DATA DOCUMENT	F3025-AIR 9173 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
THREAD DIRECTION	RIGHT-HAND
THREAD FORMING METHOD	ROLLED
THREAD LENGTH	8.5 MILLIMETERS NOMINAL
THREAD SERIES DESIGNATOR	ISO M
THREAD PITCH IN MILLIMETERS	0.8

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