The Seat,valve, cataloged under National Stock Number 4820-01-466-4702, 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4 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-466-4702 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Special Test Features | TESTED AT 550 PSIG WATER OR 80 PSIG AIR FOR 30 SEC. NO LEAKAGE ALLOWED |
| Style Designator | THREADED FLANGED |
| Body Inside Diameter | 4.000 INCHES NOMINAL IN |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| ANN-L1L-A--8136 ITEM 11 | 5/2 Secondary reference U.S. Government activity |
| ANN-L1L-A--8136 | D/9 Drawing number reference only U.S. Government activity |
| ANRTL008 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-466-4702 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-466-4703. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-466-4702: Special Test Features: TESTED AT 550 PSIG WATER OR 80 PSIG AIR FOR 30 SEC. NO LEAKAGE ALLOWED; Style Designator: THREADED FLANGED; Body Inside Diameter: 4.000 INCHES NOMINAL IN; Special Features: NHA BALL VALVE. 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.