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Tube Coupling Nut


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Item Specifics

Federal Supply Class (FSC)
Hose Pipe Tube Lubrication And Railing Fittings
National Item ID Number (NIIN)
Thread Class
Thread Direction
Right-hand AAJF
Fabrication Method
Any acceptable AARN
Nut Style
Tube coupling ACTA
Nut Height
0.672 inches ADEA
Width Across Flats
0.621 inches minimum and 0.628 inches maximum ASDB
Length To Shoulder
0.579 inches BRQL
Smallest Inside Diameter
0.374 inches minimum and 0.377 inches maximum BSPX
Thread Series
Thread Quantity Per Inch
Nominal Thread Size
0.500 inches CQJX
Nominal Tube Outside Diameter
0.312 inches CQRJ
Special Features
Grumman a-10 aircraft FEAT
Aluminum alloy overall MATT
Surface Treatment
Anodize overall SFTT

Item Identification | Hose Pipe Tube Lubrication And Railing Fittings

4730-00-287-0292, An internally threaded nut which has either an internal seat or shoulder and/or is designed to be used with a ferrule, to mate with the seat of an externally threaded tube fitting to form a leakproof connection. excludes nut (1), tube coupling, reducing; and nut (1), union.

Supply Class (FSC)NSN AssignmentNIINItem Name Code (INC)
4730 Jan 01, 1961 002870292 03859 (Nut, Tube Coupling)

End Item Applications NSN 4730-00-287-0292 end item applications/platforms

Item Identification Guide

NSN Reference Drawing

Tube Coupling Nuts Cross Reference

Part Number CAGE Variation
AN818-5D Cage Code 88044 Original Part
50419 Cage Code 55284 Superseded, Discontinued, or Replaced
941-1830-312 Cage Code 89305 Superseded, Discontinued, or Replaced
720335-5 Cage Code 56232 Superseded, Discontinued, or Replaced
AN818-5D Cage Code 32142 Superseded, Discontinued, or Replaced
8168179 Cage Code 18876 Superseded, Discontinued, or Replaced
290-5D Cage Code 00624 Superseded, Discontinued, or Replaced
1158-5D Cage Code 00624 Cross Ref. Part
019-1018-000 Cage Code 13499 Cross Ref. Part
946.29.95.204 Cage Code S4080 Superseded, Discontinued, or Replaced
290-5D Cage Code R1120 Superseded, Discontinued, or Replaced
AN818-5D Cage Code 17341 Superseded, Discontinued, or Replaced
AN818-5D Cage Code 14798 Superseded, Discontinued, or Replaced
731857-105 Cage Code 56232 Superseded, Discontinued, or Replaced
AS4841 Cage Code 81343 Superseded, Discontinued, or Replaced

National Motor Freight NMFC: A six position numeric code, which divides articles into groups or classes according to physical characteristics. The classification is based on truckloads vs. less than truckload.

Code Description Code Value Meaning
NMF Description NMFC 013540 Alum Nuts
Universal Freight Code UFC 05680
Less than a truck load rating LTL Q 70.0
Water Commodity WCC 576 Metal and metal products, nos, (less than 35 feet)
Type of Cargo TCC Z No special type of cargo code applicable
Special Handling SHC 9 Other or no special handling required (sh)
Air Dimension Code ADC A Shipment is not a consolidation and does not exceed 84 inches in any dimension.
Air Commodity ACC B Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition materials and their products, commercial hardware and miscellaneous items, cement, asphalt, building maintenance materials.
Air Special Handling ASH Array No special handling required.

Trade Control Compliance Schedule B Export Code: A ten position numeric code that identifies an item exported overseas. this unique identification code is assigned by the U.S. Census Bureau.

Schedule B Sch. B Description Demilitarization Classification ITAR Regulation
7609000000 Aluminum tube or pipe fittings (couplings,elbows sleeves) Non-usml/non-ccli - no demil or dod tsc required. department of commerce may impose licensing requirements to certain destinations. (note 9). Unclassified Not ITAR Controlled

MOE / End Users Represents the subdivisions of a US governmental organization or an agency of the North Atlantic Treaty Organization (NATO), and other friendly governments and international organizations participating in the federal catalog program.

Country / Entity Name MOE
ZZ Department Of The Navy ZZ
No MOE rules found for this NSN.

Material & Special Handling Item material and handling information

Code Description Value Meaning
HMIRS N Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
Precious Metals Indicator U Precious metal content is unknown
Criticality Code X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Management Rec. / Rep. Code: Special program consumables

 CTL: 9B-----

Air Force

Fund SF – Stock fund applicable to items managed for the air force by the respective inventory control point.
Budget 9 – Air force decentrally managed
Material Management SX – Brac mmac for oc-alc
Price Validation V – The current standard price has been validated. - the item has been analyzed in conjunction with the zero overpricing program and is in the accepted price range. -the item was procured under open competition and under the competitive arena the price is considered fair and reasonable. -zop or standard price challenges are permissible but must be supported by adequate justification.

Air Force Management Code Definition

Fund A two position code that classifies an item into categories in terms of funding and budgeting.
Budget Identifies investment items to budget programs from which item is funded.
Material Management Identifies an item of supply to be managed by a specific activity manager.
Price Validation Indicates validity of the recorded unit price.


Stores Account 1 – Marine corps stock fund account item.
Combat Essentiality 2 – Non-critical repair part. repair parts or major components whose failure in an end item will not render the end item inoperati
Management Echelon B – All commodities
Material Identification
Operational Test
Physical Category

Marines Code Definition

Stores Account (SAC) Indicates the type of funds employed within the marine corps in supply support operations.
Combat Essentiality (CEC) Establishes if an item is essential to the operational readiness of a weapon system or the conduct of a military mission, or that a functional part contributes to the tactical and essential operations of an item component or assembly, and its failure would render the item inoperable or incapable of fulfilling its mission.
Management Echelon (MEC) Classifies items into categories by material and procurement echelon.
Material Identification (MIC) Identifies method of accounting, degree, and type of control to be maintained for the item and to identify material by specific purpose, type, or classification for the war reserve system.
Operational test (OTC) Indicates special procedures must be performed on an item of supply while under care-in-stores or as a part of the issue process.
Physical Category (PCC) Indicates category for picking, packing, and marking items for shipment.


Cognizance 9B – Naval inventory control point, mechanicsburg
Special Material
Requisition Restriction
Special Material Content

Navy Management Code Definition

Cognizance (COG) Identifies the inventory manager (IM) and inventory control point (ICP).
Special Material (SMIC) Categorizes material on the basis of requirements for source or quality control, technical design, or configuration control, procurement, stocking and issue control, special receipt, inspection, testing, storage, or handling
Req. Restriction (IRRC) Item requisition instructions.
Special Material (SMCC) Indicated that an item represents or contains peculiar material requiring special treatment, precautions, or management.


Accounting Requirements X – Expendable item. an item of army property coded with an arc of ``x'' in the amdf. expendable items require no formal accountability after issue from a stock record account. commercial and fabricated items similar to items coded ``x'' in the amdf are considered expendable items.
Material Category 1 J – Ground forces support materiel (dla/gsa items)
Material Category 2 2 – Stock fund secondary items
Material Category 3 2 – Nonreparable items (exclusive of insurance and provisioning items). this code will be used to identify items which are not reparable.
Material Category 4 & 5 BX – Oh-58d army helicopter improvement program (ahip)

Army Management Code Definition

Accounting Requirements Accounting Requirements Code (ARC): a one position alpha code that indicates the accountability of an item of supply.
Material Category 1 Material category and inventory manager.
Material Category 2 Appropriation and budget activity account.
Material Category 3 Management inventory segment.
Material Category 4 & 5 Specific group / generic category.