PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2621-791-03ASSY121AUnion,pipe

Electric Boat Corporation Div General Dynamics Electric Boat · NSN 4730-01-089-2907 · FSC 4730 · No Item Name Available
Verified by PartsTable
NSN 4730-01-089-2907 — this item is cataloged by the U.S. Government under National Stock Number 4730-01-089-2907. Primary manufacturer part number: 2621-791-03ASSY121A.
Features
  • Union,pipe — FSC 4730
  • Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS
  • Seat Type: BEVELED
  • Nominal Pipe Size Accommodated: 2.000 INCHES ALL ENDS IN
  • Connection Style: SOCKET (PIPE) ALL ENDS
  • Pipe Wall Thickness Designation for Which Designed: SCHEDULE STD ALL ENDS
  • Coupling Flange Shape: HEXAGON
  • Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Applications
  • Fluid conveyance
  • Hydraulic system plumbing
  • Pneumatic line routing
  • Applications requiring Nickel Alloy Overall construction
General Description

The Union,pipe, cataloged under National Stock Number 4730-01-089-2907, 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 Electric Boat Corporation Div General Dynamics Electric Boat. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4730-01-089-2907
Primary Part Number2621-791-03ASSY121A
Item NameUnion,pipe
FSC / FSG4730 / 47 — No Item Name Available
ManufacturerElectric Boat Corporation Div General Dynamics Electric Boat
StatusACTIVE
Connection TypeUNTHREADED INTERNAL PIPE ALL ENDS
Seat TypeBEVELED
Nominal Pipe Size Accommodated2.000 INCHES ALL ENDS IN
Connection StyleSOCKET (PIPE) ALL ENDS
Pipe Wall Thickness Designation for Which DesignedSCHEDULE STD ALL ENDS
Coupling Flange ShapeHEXAGON
Operating Pressure3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MaterialNICKEL ALLOY OVERALL
Nominal Overall Length5.375 INCHES IN
Style DesignatorSCREWED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
4730-01-096-6388 INTERCHANGEABLE
Union Assembly
4730-01-129-80172621-791-03ASSY121 INTERCHANGEABLE
Union,pipe
Electric Boat Corporation Div General Dynamics Electric Boat
9390-01-202-560615975379 INTERCHANGEABLE
Nonmetallic Special Shaped Secti
General Motors Llc Dba General Motors Llc
Cross-Reference Index
Part NumberManufacturer
15-97-5379 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
2621-791-03ASSY121A PRIMARY Electric Boat Corporation Div General Dynamics Electric Boat (USA)
Related Parts
4730-01-096-6388INTERCHANGEABLE
UNION ASSEMBLY
4730-01-129-8017INTERCHANGEABLE
UNION,PIPE
2621-791-03ASSY121
9390-01-202-5606INTERCHANGEABLE
NONMETALLIC SPECIAL SHAPED SECTI
15975379

Frequently Asked Questions

What is NSN 4730-01-089-2907?

NSN 4730-01-089-2907 is a Union,pipe, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 4730 (No Item Name Available). Status: active.

What are the part numbers for NSN 4730-01-089-2907?

NSN 4730-01-089-2907 has 2 cross-referenced part numbers: 15-97-5379 (Electric Boat Corporation Div General Dynamics Electric Boat), 2621-791-03ASSY121A (Electric Boat Corporation Div General Dynamics Electric Boat).

What NSN replaces 4730-01-089-2907?

There are 3 known substitutes for 4730-01-089-2907: 4730-01-096-6388, 4730-01-129-8017, 9390-01-202-5606. Verify interchangeability with system specifications before substitution.

What are the specifications of 2621-791-03ASSY121A?

Key specifications for 2621-791-03ASSY121A: Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS; Seat Type: BEVELED; Nominal Pipe Size Accommodated: 2.000 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS. 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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