PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3903-4-4-CElbow,tube to Hose

Mega Fluidline Products, Inc. · NSN 4730-01-344-3781 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-344-3781 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-344-3781. Primary manufacturer part number: 3903-4-4-C.
Features
  • Elbow,tube to Hose — FSC 4730
  • Connection Type: THREADED INTERNAL TUBE FIRST END
  • Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
  • Seat Angle: 37.0 DEGREES ALL ENDS
  • Flow Angle: 90.0 DEGREES
  • Connection Type: THREADED EXTERNAL TUBE SECOND END
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES ALL ENDS IN
  • Media for Which Designed: AIR FIRST RESPONSE
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
General Description

The Elbow,tube to Hose, cataloged under National Stock Number 4730-01-344-3781, 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 Mega Fluidline Products, Inc.. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-344-3781
Primary Part Number3903-4-4-C
Item NameElbow,tube to Hose
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerMega Fluidline Products, Inc.
StatusACTIVE
Connection TypeTHREADED INTERNAL TUBE FIRST END
Connection StyleSWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END
Seat Angle37.0 DEGREES ALL ENDS
Flow Angle90.0 DEGREES
Connection TypeTHREADED EXTERNAL TUBE SECOND END
Nominal Outside Diameter Tube Accommodated0.250 INCHES ALL ENDS IN
Media for Which DesignedAIR FIRST RESPONSE
Media for Which DesignedHYDRAULIC FLUID SECOND RESPONSE
Connection StyleFLARED (TUBE) SECOND END
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4730-00-137-78762071-4-4S INTERCHANGEABLE
Elbow,tube
Danfoss Power Solutions II, Llc
Cross-Reference Index
Part NumberManufacturer
3903-4-4-C PRIMARY Mega Fluidline Products, Inc. (USA)
Related Parts
4730-00-137-7876INTERCHANGEABLE
ELBOW,TUBE
2071-4-4S

Frequently Asked Questions

What is NSN 4730-01-344-3781?

NSN 4730-01-344-3781 is a Elbow,tube to Hose, manufactured by Mega Fluidline Products, Inc., classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-344-3781?

NSN 4730-01-344-3781 has 1 cross-referenced part number: 3903-4-4-C (Mega Fluidline Products, Inc.).

What NSN replaces 4730-01-344-3781?

There is 1 known substitute for 4730-01-344-3781: 4730-00-137-7876. Verify interchangeability with system specifications before substitution.

What are the specifications of 3903-4-4-C?

Key specifications for 3903-4-4-C: Connection Type: THREADED INTERNAL TUBE FIRST END; Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END; Seat Angle: 37.0 DEGREES ALL ENDS; Flow Angle: 90.0 DEGREES. 10 total characteristics are documented in the Federal Logistics Information System.

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