The Retainer,seat,valve, cataloged under National Stock Number 4820-01-373-7635, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-373-7635 |
| Item Name | Retainer,seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Outside Diameter | 0.375 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5659 15-5PH ASSN STD SINGLE MATERIAL RESPONSE |
| Inside Diameter | 0.205 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 43315 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-373-7635 is a Retainer,seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6150-01-464-4903. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-373-7635: Outside Diameter: 0.375 INCHES NOMINAL IN; Material Document and Classification: AMS 5659 15-5PH ASSN STD SINGLE MATERIAL RESPONSE; Inside Diameter: 0.205 INCHES MINIMUM AND 0.210 INCHES MAXIMUM IN; End Item Identification: 4820-01-371-6593. 4 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.