The Seat,valve, cataloged under National Stock Number 4820-00-149-2152, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-149-2152 |
| Primary Part Number | 11052A |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa |
| Status | ACTIVE |
| Style Designator | PLAIN THREADED |
| Material Document and Classification | QQ-N-288,COMP B FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Body Inside Diameter | 4.250 INCHES NOMINAL IN |
| Material | NICKEL ALLOY BODY |
| Seat Angle in Deg | 90.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 11052A PRIMARY | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa (USA) |
| 6680706-2 | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 6680706-2 | 5/9 Secondary reference General Electric Co Switchgear and Control Division of Apparatus Group |
NSN 4820-00-149-2152 is a Seat,valve, manufactured by Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-149-2152 has 2 manufacturer part numbers on file: 11052A (Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa), 6680706-2 (General Electric Company).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-218-8385. Verify interchangeability with system specifications before substitution.
Key specifications for 11052A: Overall Height: 0.750 INCHES NOMINAL IN; Style Designator: PLAIN THREADED; Material Document and Classification: QQ-N-288,COMP B FED SPEC SINGLE MATERIAL RESPONSE BODY; Body Inside Diameter: 4.250 INCHES NOMINAL IN. 6 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.