PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AN790C4Elbow,pipe to Tube

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 4730-00-230-8729 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-00-230-8729 — this item is cataloged by the U.S. Government under National Stock Number 4730-00-230-8729. Primary manufacturer part number: AN790C4.
Features
  • Elbow,pipe to Tube — FSC 4730
  • Connection Type: THREADED EXTERNAL TUBE FIRST END
  • Thread Class: 3A FIRST END A
  • Thread Quantity Per Inch: 27 SECOND END
  • Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN
  • Connection Style: PLAIN (PIPE) SECOND END
  • Nominal Thread Size: 0.438 INCHES FIRST END IN
  • Thread Series Designator: ANPT SECOND END
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Elbow,pipe to Tube, cataloged under National Stock Number 4730-00-230-8729, 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 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4730-00-230-8729
Primary Part NumberAN790C4
Item NameElbow,pipe to Tube
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusCANCELLED
Connection TypeTHREADED EXTERNAL TUBE FIRST END
Thread Class3A FIRST END A
Thread Quantity Per Inch27 SECOND END
Nominal Outside Diameter Tube Accommodated0.250 INCHES FIRST END IN
Connection StylePLAIN (PIPE) SECOND END
Nominal Thread Size0.438 INCHES FIRST END IN
Thread Series DesignatorANPT SECOND END
MaterialSTEEL CORROSION RESISTING OVERALL
Leg Length0.750 INCHES NOMINAL FIRST END IN
Thread Series DesignatorUNF FIRST END
Connection StyleINVERTED FLARE (TUBE) FIRST END
Nominal Thread Size0.125 INCHES SECOND END IN
Seat Angle50.0 DEGREES FIRST END
Connection TypeTHREADED EXTERNAL PIPE SECOND END
Leg Length0.812 INCHES NOMINAL SECOND END IN
Nominal Pipe Size Accommodated0.125 INCHES SECOND END IN
Flow Angle90.0 DEGREES
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5975-00-518-0186 INTERCHANGEABLE
Junction Box
5305-01-072-888157442 INTERCHANGEABLE
Screw,socket
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
AN790C4 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
AN790C4 Collins Engineering Corp (USA)
AN790C4 Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN)
7410039 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
57442 Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN)
AN790C4 Aeronautical Standards Group Dept of Navy and Air Force (USA)
AN790C4 Marwell Engineering Co (USA)
57442 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
5975-00-518-0186INTERCHANGEABLE
JUNCTION BOX
5305-01-072-8881INTERCHANGEABLE
SCREW,SOCKET
57442

Frequently Asked Questions

What is NSN 4730-00-230-8729?

NSN 4730-00-230-8729 is a Elbow,pipe to Tube, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 4730 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4730-00-230-8729?

NSN 4730-00-230-8729 has 8 cross-referenced part numbers: AN790C4 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), AN790C4 (Collins Engineering Corp), AN790C4 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.), 7410039 (U S Army Tank Automotive Command Amsta-Im-Mm), 57442 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.) and 3 more.

What NSN replaces 4730-00-230-8729?

There are 2 known substitutes for 4730-00-230-8729: 5975-00-518-0186, 5305-01-072-8881. Verify interchangeability with system specifications before substitution.

What are the specifications of AN790C4?

Key specifications for AN790C4: Connection Type: THREADED EXTERNAL TUBE FIRST END; Thread Class: 3A FIRST END A; Thread Quantity Per Inch: 27 SECOND END; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4730-00-230-8729 still in active supply?

NSN 4730-00-230-8729 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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