Valve, Safety Relief 4820-01-453-6573 NSN 4820-01-453-6573 · NIIN 014536573 · Part number 1146-OOP
Portaco, Inc. · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 0S4R0
NSN 4820-01-453-6573 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-453-6573. Manufacturer of record part number: 1146-OOP .
Also searched as
4820-01-453-6573 ·
4820014536573 ·
NIIN 014536573 ·
01-453-6573 ·
FSC 4820 Valves, Nonpowered · CAGE 0S4R0 · 1146-OOP
Nearby stock numbers
← 4820-01-453-6560 Disk, Valve
·
4820-01-453-6574 Valve, Check →
4820-01-453-6573 — Valves, Nonpowered
Features
Valve,safety Relief — FSC 4820 1 manufacturer part number on file Manufacturer of record: Portaco, Inc.
Identification
NSN: 4820-01-453-6573
NIIN: 014536573
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 1146-OOP
Manufacturer: Portaco, Inc.
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-453-6573, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Portaco, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter Value NSN 4820-01-453-6573 Primary Part Number 1146-OOP Item Name Valve,safety Relief FSC / FSG 4820 / 48 — Valves, Nonpowered Manufacturer Portaco, Inc. Status ACTIVE
Lifecycle & Compliance
Acquisition Status ACTIVE DEMIL Code DEMIL A — No Demilitarization Required Hazard No hazard code in the DLA record (HMIC N) Criticality Code X
Cross-Reference Index
Part Number Manufacturer
1146-OOP PRIMARY Portaco, Inc. (USA)
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
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4820-00-001-0010
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4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Related Parts in Valves
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
8171E-1/4HS2
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
D559A3M2
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-453-6573?
NSN 4820-01-453-6573 is a Valve,safety Relief, manufactured by Portaco, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-453-6573?
NSN 4820-01-453-6573 has 1 manufacturer part number on file: 1146-OOP (Portaco, Inc.).
What are the specifications of 1146-OOP?
Key specifications for 1146-OOP: End Item Identification: DIVERS LIFE SUPPORT SYSTEM. 0 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-453-6573 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.
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