The Valve,ball, cataloged under National Stock Number 4820-01-406-4550, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 30 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-406-4550 |
| Primary Part Number | 801-6404977 ASSEMBLY 97SS |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Flange Shape | ROUND WITH HOLES THIRD END |
| Flange Face Design | PLAIN FIRST END |
| Flange Face Design | PLAIN SECOND END |
| Flange Face Design | PLAIN THIRD END |
| Bolt Circle Nominal Diameter | 8.250 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 10.500 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 8.250 INCHES THIRD END IN |
| Criticality Code Justification | ZZZY |
| Connection Type | FLANGE SECOND END |
| Connection Type | FLANGE FIRST END |
| Connection Type | FLANGE THIRD END |
| Style Designator | CROSS FLANGED ENDS |
| Material Document and Classification | MIL-T-9047 MIL SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | MIL-C-20159, ALY C96400 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Bolt Hole Nominal Diameter | 0.656 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.6935 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 0.6935 INCHES THIRD END IN |
| Operating Pressure | 20000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL POWER DRIVE LBS |
| Nominal Outside Diameter | 12.250 INCHES SECOND END IN |
| Nominal Outside Diameter | 9.750 INCHES FIRST END IN |
| Nominal Outside Diameter | 9.750 INCHES THIRD END IN |
| Bolt Hole Quantity | 12 THIRD END |
| Bolt Hole Quantity | 16 SECOND END |
| Bolt Hole Quantity | 12 FIRST END |
| Face to Face Distance | 19.163 INCHES IN |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| First Connection Face to Centerline Distance | 9.750 INCHES 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 |
|---|---|
| 801-6404977 ASSEMBLY 97SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 211080793SS | Naval Inventory Control Point Mechanicsburg (USA) |
| 6404977 ASSY 97SS | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 801-6404977 ASSEMBLY 97 | 5/1 Secondary reference Naval Sea Systems Command |
| 211080793 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 6404977 ASSY 97 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 4820-01-406-4550 is a Valve,ball, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-406-4550 has 3 manufacturer part numbers on file: 801-6404977 ASSEMBLY 97SS (Naval Inventory Control Point Mechanicsburg), 211080793SS (Naval Inventory Control Point Mechanicsburg), 6404977 ASSY 97SS (Naval Inventory Control Point Mechanicsburg).
Key specifications for 801-6404977 ASSEMBLY 97SS: Flange Shape: ROUND WITH HOLES FIRST END; Flange Shape: ROUND WITH HOLES SECOND END; Flange Shape: ROUND WITH HOLES THIRD END; Flange Face Design: PLAIN FIRST END. 30 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 4820-01-406-4550 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.