The Stem Disk Assembly, cataloged under National Stock Number 4820-01-046-2196, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-046-2196 |
| Primary Part Number | 803-2177142-51X57 |
| Item Name | Stem Disk Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | CONSIST OF 1 EA BODY GUIDED NUT,1 EA STEM,1 EA STEMCOLLAR,6 EA BONNET RETAINER STUD NUT |
| 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 |
|---|---|
| 803-2177142-51X57 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 810-2177142-51X57 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 4820-01-046-2196 is a Stem Disk Assembly, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-046-2196 has 1 manufacturer part number on file: 803-2177142-51X57 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-516-6876. Verify interchangeability with system specifications before substitution.
Key specifications for 803-2177142-51X57: General Characteristics Item Description: CONSIST OF 1 EA BODY GUIDED NUT,1 EA STEM,1 EA STEMCOLLAR,6 EA BONNET RETAINER STUD NUT; End Item Identification: NAVAL SHIP SYSTEMS COMMAND 5 IN. BW 900 ANSI VALVE IN. 1 specification is 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.