PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4-4CUSElbow,pipe to Tube

Parker Hannifin (uk) Ltd · NSN 4730-00-278-5580 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-278-5580 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-278-5580. Primary manufacturer part number: 4-4CUS.
Features
  • Elbow,pipe to Tube — FSC 4730
  • Thread Class: 2A FIRST END A
  • Connection Type: THREADED EXTERNAL PIPE SECOND END
  • Seat Angle: 12.0 DEGREES FIRST END
  • Thread Series Designator: NPTF SECOND END
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
  • Specification/standard Data: 96906-MS51815 GOVERNMENT STANDARD AND 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
  • Nominal Thread Size: 0.438 INCHES FIRST END IN
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Overall construction
General Description

The Elbow,pipe to Tube, cataloged under National Stock Number 4730-00-278-5580, 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 Parker Hannifin (uk) Ltd. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 28 commercial cross-references from 21 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-278-5580
Primary Part Number4-4CUS
Item NameElbow,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerParker Hannifin (uk) Ltd
StatusCANCELLED
Thread Class2A FIRST END A
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Seat Angle12.0 DEGREES FIRST END
Thread Series DesignatorNPTF SECOND END
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Specification/standard Data96906-MS51815 GOVERNMENT STANDARD AND 81343-J514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
Nominal Thread Size0.438 INCHES FIRST END IN
Nominal Pipe Size Accommodated0.250 INCHES SECOND END IN
Connection StylePLAIN (PIPE) SECOND END
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Nominal Thread Size0.250 INCHES SECOND END IN
Nondefinitive Spec/std Data21A FIGURE A
Thread Series DesignatorUNF FIRST END
Surface Treatment Document and ClassificationMIL-C-16232,TYPE M,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentPHOSPHATE OVERALL
Leg Length1.031 INCHES NOMINAL FIRST END IN
Leg Length1.094 INCHES NOMINAL SECOND END IN
Furnished Items and Quantity1 FLARED SLEEVE AND 1 SHORT COUPLING NUT
Connection StyleFLARELESS (TUBE) FIRST END
MaterialSTEEL OVERALL
Flow Angle90.0 DEGREES
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
4730-00-096-8331 INTERCHANGEABLE
Elbow,pipe to Tube
2815-00-172-0669BM34437 INTERCHANGEABLE
Plate Assy,rear
Cummins Inc.
3431-01-469-3357907 481 INTERCHANGEABLE
Welding Machine,inverter
Miller Electric Mfg. Llc
Cross-Reference Index
Part NumberManufacturer
4-4CUS Parker Hannifin (uk) Ltd (GBR)
4-4CUS Parker Hannifin (uk) Ltd (GBR)
MS51815-5P Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
R900-4-4 Chicago Fittings (USA)
7405 1/4X1/4 Danfoss Power Solutions II, Llc (USA)
4-4 080202CA-PHOS Society of Automotive Engineers Inc (USA)
MS51815-5P Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division (USA)
MIL-F-18866 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
4730008252168 E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales
4-4CBU-S Parker-Hannifin Corporation Dba Pneutronics Div Hose Products Division (USA)
MIL-DTL-18866 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS51815-5P Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems (USA)
03770-010 Eme Elektro-Metall Export Gmbh (DEU)
J514 Society of Automotive Engineers Inc (USA)
03770-010 Curtiss-Wright Flow Control Service, Llc Dba Engineered Arresting Systems - Esco Div Cw Flow Control Svc Llc Dba (USA)
907481 Scandinavian Manufacturing Scama Ab (SWE)
7405X4X4 Danfoss Power Solutions II, Llc (USA)
4-4 080202CA-PHOS Sae International Dba Sae International (USA)
J514 Sae International Dba Sae International (USA)
4730008252168 E.c.a Etablissement Centrald'approvisionnement Des Forces Armee
Related Parts
4730-00-096-8331INTERCHANGEABLE
ELBOW,PIPE TO TUBE
2815-00-172-0669INTERCHANGEABLE
PLATE ASSY,REAR
BM34437
3431-01-469-3357INTERCHANGEABLE
WELDING MACHINE,INVERTER
907 481

Frequently Asked Questions

What is NSN 4730-00-278-5580?

NSN 4730-00-278-5580 is a Elbow,pipe to Tube, manufactured by Parker Hannifin (uk) Ltd, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-278-5580?

NSN 4730-00-278-5580 has 28 cross-referenced part numbers: 4-4CUS (Parker Hannifin (uk) Ltd), 4-4CUS (Parker Hannifin (uk) Ltd), MS51815-5P (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), R900-4-4 (Chicago Fittings), 7405 1/4X1/4 (Danfoss Power Solutions II, Llc) and 23 more.

What NSN replaces 4730-00-278-5580?

There are 3 known substitutes for 4730-00-278-5580: 4730-00-096-8331, 2815-00-172-0669, 3431-01-469-3357. Verify interchangeability with system specifications before substitution.

What are the specifications of 4-4CUS?

Key specifications for 4-4CUS: Thread Class: 2A FIRST END A; Connection Type: THREADED EXTERNAL PIPE SECOND END; Seat Angle: 12.0 DEGREES FIRST END; Special Features: END ITEM: GRUMMAN A10 AIRCRAFT. 22 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-278-5580 still in active supply?

NSN 4730-00-278-5580 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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