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National Stock Number:
5306-14-412-6876
Federal Supply Class:
5306
National Item Identification Number:
144126876
Description:
BOLT,CLOSE TOLERANCE
Detail:
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see BOLT, SHEAR. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see BOLT, MACHINE.
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Manufacturer Information:
| 22138BE080031M | F0111 | BUREAU NORMALISATION AERONAUTIQUEESPACE | | 22138BE080031M | F0188 | BLANC AERO INDUSTRIES - GROUPE LISIAEROSPACE | | 22138BE080031M | F0236 | SAINT CHAMOND GRANAT SA | | 22138BE080031M | F0434 | ALIGN AEROSPACE FRANCE SAS | | L22138-80-31BEM | F0111 | BUREAU NORMALISATION AERONAUTIQUEESPACE |
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Techincal Specification:
| EXTERNAL THREAD TOLERANCE CLASS | 2 | | FASTENER LENGTH | 31.0 MILLIMETERS NOMINAL | | GRIP DIAMETER | 7.972 MILLIMETERS MINIMUM AND 7.987 MILLIMETERS MAXIMUM | | GRIP LENGTH | 19.0 MILLIMETERS NOMINAL | | HEAD HEIGHT | 4.5 MILLIMETERS NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | F3025 AIR 9160C MIL STD SINGLE MATERIAL RESPONSE | | MATERIAL | STEEL COMP 35NC6 | | MINIMUM TENSILE STRENGTH | 88.0 HECTOBAR | | MINIMUM YIELD STRENGTH | 74.0 HECTOBAR | | NOMINAL THREAD DIAMETER | 8.0 MILLIMETERS | | SCREW THREAD LENGTH | 12.0 MILLIMETERS NOMINAL | | SCREW THREAD SERIES DESIGNATOR | ISO M | | WIDTH BETWEEN FLATS | 13.0 MILLIMETERS NOMINAL | | SURFACE FINISH | 0.8 MICRONS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NF L 09-753 CODE L NATIONAL SPEC SINGLE TREATMENT RESPONSE | | THREAD DIRECTION | RIGHT-HAND | | THREAD PITCH IN MILLIMETERS | 1.25 |
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