The Cap,valve, cataloged under National Stock Number 4820-01-435-3136, 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 7 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-435-3136 |
| Primary Part Number | 33566 002 6144 000 |
| Item Name | Cap,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa |
| Status | ACTIVE |
| Valve Type for Which Designed | RELIEF |
| Valve Model Number for Which Designed | A&M 6IN. PRESSURE RELIEF IN |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE |
| Valve Size for Which Designed | 6.000 INCHES IN |
| Height | 4.750 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Attachment Method | BOLTS |
| 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 |
|---|---|
| 33566 002 6144 000 PRIMARY | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa (USA) |
| 33566 002 6144 | Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa (USA) |
NSN 4820-01-435-3136 is a Cap,valve, manufactured by Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-435-3136 has 2 manufacturer part numbers on file: 33566 002 6144 000 (Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa), 33566 002 6144 (Atwood & Morrill Co., Inc. Dba Weir Valves and Controls Usa).
Key specifications for 33566 002 6144 000: Valve Type for Which Designed: RELIEF; Valve Model Number for Which Designed: A&M 6IN. PRESSURE RELIEF IN; Material Document and Classification: MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE; Valve Size for Which Designed: 6.000 INCHES IN. 7 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.