The Valve,ball, cataloged under National Stock Number 4820-01-137-2124, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-137-2124 |
| Primary Part Number | 256132ASSYATCK4IN |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Bolt Circle Nominal Diameter | 7.188 INCHES FIRST END IN |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.866 INCHES FIRST END IN |
| Valve Size | 4.000 INCHES IN |
| Bonnet Type | PACKING RETAINING |
| Nominal Outside Diameter | 8.866 INCHES FIRST END IN |
| Bolt Hole Quantity | 10 FIRST END |
| Face to Face Distance | 15.500 INCHES IN |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 1.500 INCHES FIRST END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 256132ASSYATCK4IN PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 256132ASSEMBLYATCK4IN | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
NSN 4820-01-137-2124 is a Valve,ball, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-137-2124 has 2 manufacturer part numbers on file: 256132ASSYATCK4IN (Huntington Ingalls Inc Div Newport News Shipbuilding), 256132ASSEMBLYATCK4IN (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 256132ASSYATCK4IN: Flange Shape: ROUND WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Bolt Circle Nominal Diameter: 7.188 INCHES FIRST END IN; Connection Type: FLANGE FIRST END. 13 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4820-01-137-2124 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.