The Tailpiece,union, cataloged under National Stock Number 4730-01-148-0021, 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 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-148-0021 |
| Primary Part Number | 2621-791-01 PIECE 121 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — No Item Name Available |
| Manufacturer | Electric Boat Corporation Div General Dynamics Electric Boat |
| Status | ACTIVE |
| End Connection Type | WELDED |
| Seat Type | GASKET |
| Union Outside Diameter | 0.500 INCHES NOMINAL IN |
| Material | COPPER ALLOY 715 |
| Nominal Pipe Size Designation | 0.500 INCHES IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 502-4685887 ITEM F23 | Naval Ship Systems Command (USA) |
| 2621-791-01 PIECE 121 PRIMARY | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 2621-791-01 | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 87645-5421 | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 502-4685887 F23 | Naval Ship Systems Command (USA) |
| 87645-5421 ITEM F23 | Electric Boat Corporation Div General Dynamics Electric Boat (USA) |
| 502-4685887 | Naval Ship Systems Command (USA) |
NSN 4730-01-148-0021 is a Tailpiece,union, manufactured by Electric Boat Corporation Div General Dynamics Electric Boat, classified under FSC 4730 (No Item Name Available). Status: active.
NSN 4730-01-148-0021 has 7 cross-referenced part numbers: 502-4685887 ITEM F23 (Naval Ship Systems Command), 2621-791-01 PIECE 121 (Electric Boat Corporation Div General Dynamics Electric Boat), 2621-791-01 (Electric Boat Corporation Div General Dynamics Electric Boat), 87645-5421 (Electric Boat Corporation Div General Dynamics Electric Boat), 502-4685887 F23 (Naval Ship Systems Command) and 2 more.
There is 1 known substitute for 4730-01-148-0021: 4730-01-140-4853. Verify interchangeability with system specifications before substitution.
Key specifications for 2621-791-01 PIECE 121: Overall Length: 1.875 INCHES NOMINAL IN; End Connection Type: WELDED; Seat Type: GASKET; Union Outside Diameter: 0.500 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.