The Disk,valve, cataloged under National Stock Number 4820-01-168-7616, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Siemens Energy, Inc.. Government technical data includes 7 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-168-7616 |
| Primary Part Number | M225AE |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| Shank Diameter | 0.370 INCHES NOMINAL IN |
| Flange Seat to Disk End Height | 8.125 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Tip Diameter | 0.245 INCHES NOMINAL IN |
| Seat Angle | 70.0 DEGREES NOMINAL |
| Under Flange Height | 4.095 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| F7757 PIECE 21 | Siemens Energy, Inc. (USA) |
| M225AE PRIMARY | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| F7757 | 5/9 Secondary reference Siemens Energy, Inc. |
| M225AF | 5/9 Secondary reference Siemens Energy, Inc. |
| F7757 PIECE 22A | C/1 Advisory reference — outside the item-of-supply concept Siemens Energy, Inc. |
| F7757 PIECE 22 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 4820-01-168-7616 is a Disk,valve, manufactured by Siemens Energy, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-168-7616 has 2 manufacturer part numbers on file: F7757 PIECE 21 (Siemens Energy, Inc.), M225AE (Siemens Energy, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 2825-01-170-2486, 2825-01-170-2487. Verify interchangeability with system specifications before substitution.
Key specifications for M225AE: Shank Diameter: 0.370 INCHES NOMINAL IN; Flange Seat to Disk End Height: 8.125 INCHES NOMINAL IN; Overall Height: 12.000 INCHES NOMINAL IN; Style Designator: POPPET. 7 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.
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.