The Valve,stop-Check, cataloged under National Stock Number 4820-00-431-8323, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-431-8323 |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| DC20111PL20111 | 5/1 Secondary reference Aalberts Integrated Piping Systems Americas, Inc. |
| B422-0-B1CID882039301 | 3/1 Design control — primary reference Hunt Valve Company, Inc. |
| W03-2084B-02TS 33311-30 | 5/1 Secondary reference Velan Valve Corp. |
| 80661-001-2IN CID 882039193 | 3/1 Design control — primary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| S807-9 | 3/1 Design control — primary reference Sfc Valve Corporation |
| C422-0-B2 | 5/1 Secondary reference Hunt Valve Company, Inc. |
| 80661-00 1-2IN | 3/1 Design control — primary reference Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc |
| B422-0-B1C1D882033036 | 3/1 Design control — primary reference Hunt Valve Company, Inc. |
| S807-9CID-882037945 | 5/9 Secondary reference Sfc Valve Corp |
| W3-284B2TS | 3/1 Design control — primary reference Velan Valve Corp. |
| DC-20111 | 3/1 Design control — primary reference Aalberts Integrated Piping Systems Americas, Inc. |
| DC-20111/DC-20111REV0/882039586 | 5/9 Secondary reference U.S. Government activity |
| MILV22094 | 4/1 Identification reference U.S. Government activity |
NSN 4820-00-431-8323 is a Valve,stop-Check, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-054-2547, 5310-01-653-6450. Verify interchangeability with system specifications before substitution.
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.