PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

133591Nut,tube Coupling

Bendix Corp the · NSN 4730-00-222-1912 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-222-1912 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-222-1912. Primary manufacturer part number: 133591.
Features
  • Nut,tube Coupling — FSC 4730
  • Surface Treatment: CADMIUM OVERALL
  • Specification/standard Data: 88044-AN818 GOVERNMENT STANDARD
  • Thread Quantity Per Inch: 20
  • Nut Height: 0.609 INCHES NOMINAL IN
  • Width Across Flats: 0.593 INCHES NOMINAL IN
  • Nominal Tube Outside Diameter: 0.250 INCHES IN
  • Smallest Inside Diameter: 0.305 INCHES NOMINAL IN
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Fluid conveyance
  • Hydraulic system plumbing
General Description

The Nut,tube Coupling, cataloged under National Stock Number 4730-00-222-1912, is classified within Federal Supply Class 4730 (No Item Name Available) of the Pipe, Tubing, Hose, and Fittings group. The primary manufacturer of record is Bendix Corp the. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 34 commercial cross-references from 25 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-222-1912
Primary Part Number133591
Item NameNut,tube Coupling
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerBendix Corp the
StatusCANCELLED
Surface TreatmentCADMIUM OVERALL
Specification/standard Data88044-AN818 GOVERNMENT STANDARD
Thread Quantity Per Inch20
Nut Height0.609 INCHES NOMINAL IN
Width Across Flats0.593 INCHES NOMINAL IN
Nominal Tube Outside Diameter0.250 INCHES IN
Smallest Inside Diameter0.305 INCHES NOMINAL IN
Length to Shoulder0.532 INCHES NOMINAL IN
Thread SeriesUNIFIED NATIONAL JOINT FINE (UNJF)
Nut StyleTUBE COUPLING
Thread Class3B
MaterialSTEEL OVERALL
Nominal Thread Size0.438 INCHES IN
Thread DirectionRIGHT-HAND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
5305-00-013-3591 INTERCHANGEABLE
Screw,machine
5930-00-219-749926259 INTERCHANGEABLE
Bar,actuator,electrical Switch
Honeywell International Inc. Div Aerospace - Torrance
4730-00-608-855913965 INTERCHANGEABLE
Strainer Element,sediment
Grimes Aerospace Company
5975-00-673-182413359-1 INTERCHANGEABLE
Conduit Assembly,metal,rigid
Triumph Controls, Llc Dba Triumph Controls, Llc
4730-00-684-0564MS21937W4H INTERCHANGEABLE
Packing Nut
Sae International Dba Sae International
2520-00-981-85233R5741 INTERCHANGEABLE
Insert Plate,synchronizer,transm
Caterpillar Inc Div Caterpillar Defense
Cross-Reference Index
Part NumberManufacturer
133591 Bendix Corp the (USA)
B39A39 Surface Combustion Inc (USA)
AN818-4 Hydrasearch Company, Llc (USA)
7376065 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
AN818-4 Dana Corp Weatherhead Div (USA)
AN818-4 Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA)
AN818-4 Surface Combustion Inc (USA)
AN818-4 Crown Fitting Co Inc (USA)
A89716 Lockheed Martin Corporation Div Rotary and Mission Systems (USA)
AN818-4 Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA)
4730002221912 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
AN818-4 Collins Engineering Corp (USA)
AN818-4 Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company (USA)
26259 Hamilton Sundstrand Corporation (USA)
45N2832-10 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
AN818-4 Joint Electronics Type Designation System (USA)
45N2849-69 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA)
MS21937-4H Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
477 634 Piper Industrial Manufacturing Company, Llc Div Piper Industrial Manufacturing Company (USA)
140-21323 Dana Corp Weatherhead Div (USA)
Related Parts
5305-00-013-3591INTERCHANGEABLE
SCREW,MACHINE
5930-00-219-7499INTERCHANGEABLE
BAR,ACTUATOR,ELECTRICAL SWITCH
26259
4730-00-608-8559INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
13965
5975-00-673-1824INTERCHANGEABLE
CONDUIT ASSEMBLY,METAL,RIGID
13359-1
4730-00-684-0564INTERCHANGEABLE
PACKING NUT
MS21937W4H
2520-00-981-8523INTERCHANGEABLE
INSERT PLATE,SYNCHRONIZER,TRANSM
3R5741

Frequently Asked Questions

What is NSN 4730-00-222-1912?

NSN 4730-00-222-1912 is a Nut,tube Coupling, manufactured by Bendix Corp the, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-222-1912?

NSN 4730-00-222-1912 has 34 cross-referenced part numbers: 133591 (Bendix Corp the), B39A39 (Surface Combustion Inc), AN818-4 (Hydrasearch Company, Llc), 7376065 (U S Army Tank Automotive Command Amsta-Im-Mm), AN818-4 (Dana Corp Weatherhead Div) and 29 more.

What NSN replaces 4730-00-222-1912?

There are 6 known substitutes for 4730-00-222-1912: 5305-00-013-3591, 5930-00-219-7499, 4730-00-608-8559 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 133591?

Key specifications for 133591: Surface Treatment: CADMIUM OVERALL; End Item Identification: GRUMMAN A-10 ACFT; Specification/standard Data: 88044-AN818 GOVERNMENT STANDARD; Thread Quantity Per Inch: 20. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-222-1912 still in active supply?

NSN 4730-00-222-1912 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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