The Seat,valve, cataloged under National Stock Number 4820-01-184-7003, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tate Andale, Llc. Government technical data includes 2 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-184-7003 |
| Primary Part Number | H-12420-88 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tate Andale, Llc |
| Status | ACTIVE |
| Material Document and Classification | ASTM-B-150 ALY 642 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| H-12420-88 PRIMARY | Tate Andale, Llc (USA) |
| H-11352-81 PRIMARY | Tate Andale, Llc (USA) |
| Reference | Meaning |
|---|---|
| H-3200067 PIECE 66 | 5/2 Secondary reference U.S. Government activity |
| FN5074 | D/9 Drawing number reference only Tate Andale, Llc |
| H-3200067 | D/9 Drawing number reference only U.S. Government activity |
| 5338-88 | 5/9 Secondary reference Tate Andale, Llc |
| FN5074 PIECE 66 | 5/9 Secondary reference Tate Andale, Llc |
NSN 4820-01-184-7003 is a Seat,valve, manufactured by Tate Andale, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-184-7003 has 2 manufacturer part numbers on file: H-12420-88 (Tate Andale, Llc), H-11352-81 (Tate Andale, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-184-7004. Verify interchangeability with system specifications before substitution.
Key specifications for H-12420-88: Material Document and Classification: ASTM-B-150 ALY 642 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Material: COPPER ALLOY OVERALL. 2 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.