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National Stock Number:
5305-14-343-6855
Federal Supply Class:
5305
National Item Identification Number:
143436855
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.
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Manufacturer Information:
| 22252BC050020L | F0111 | BUREAU NORMALISATION AERONAUTIQUEESPACE | | 22252BC050020L | F0188 | BLANC AERO INDUSTRIES - GROUPE LISIAEROSPACE | | 22252BC050020L | F0236 | SAINT CHAMOND GRANAT SA | | 22252BC050020L | F0434 | ALIGN AEROSPACE FRANCE SAS | | 22252BC050020L | F4871 | LEFEBVRE STE DES ANCIENS ETS PAUL SA | | 2252BC050020L | F0111 | BUREAU NORMALISATION AERONAUTIQUEESPACE | | L22252-50-20BCL | F0111 | BUREAU NORMALISATION AERONAUTIQUEESPACE | | L22252-50-20BCL | KCF40 | ANIXTER LTD |
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Techincal Specification:
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | EXTERNAL THREAD TOLERANCE CLASS | 4H | | FASTENER LENGTH | 28.5 MILLIMETERS NOMINAL | | GRIP DIAMETER | 4.978 MILLIMETERS MINIMUM AND 4.990 MILLIMETERS MAXIMUM | | GRIP LENGTH | 20.0 MILLIMETERS NOMINAL | | HEAD DIAMETER | 10.0 MILLIMETERS NOMINAL | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | F0111 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 35NC6 OVERALL | | MINIMUM TENSILE STRENGTH | 880 MEGAPASCALS | | MINIMUM YIELD STRENGTH | 740 MEGAPASCALS | | NOMINAL THREAD DIAMETER | 5.0 MILLIMETERS | | 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 L NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL | | TEST DATA DOCUMENT | F3025-AIR 9173 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.). | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 8.5 MILLIMETERS NOMINAL | | THREAD SERIES DESIGNATOR | ISO M | | THREAD PITCH IN MILLIMETERS | 0.8 |
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