NSN 4820-01-449-5811 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-449-5811. Manufacturer of record part number: SS-4R3A-G.
Also searched as4820-01-449-5811 ·
4820014495811 ·
NIIN 014495811 ·
01-449-5811 ·
FSC 4820 Valves, Nonpowered · CAGE 3T9T9 · SS-4R3A-G
Media for Which Designed: WATER, FRESH SECOND RESPONSE
Material: STEEL COMP 316 BODY
Valve Operation Method: AUTOMATIC
2 manufacturer part numbers on file
Identification
NSN: 4820-01-449-5811
NIIN: 014495811
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: SS-4R3A-G
Manufacturer: Swagelok Co
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-449-5811, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Swagelok Co. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
Scioto Valve & Fitting Co Dba Swagelok Columbus (USA)
Reference documents
Reference
Meaning
SS-4R3A-G
5/9Secondary reference
Nupro Co
SS-4R3A-G
5/9Secondary reference
Scioto Valve and Fitting Co
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
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
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
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 4820-01-449-5811?
NSN 4820-01-449-5811 is a Valve,safety Relief, manufactured by Swagelok Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-449-5811?
NSN 4820-01-449-5811 has 2 manufacturer part numbers on file: SS-4R3A-G (Swagelok Co), SS-4R3A-G (Scioto Valve & Fitting Co Dba Swagelok Columbus).
What are the specifications of SS-4R3A-G?
Key specifications for SS-4R3A-G: Flow Control Device: POPPET; Style Designator: ANGLE; Special Features: 1/4 IN.SWAGELOK END CONNECTIONS;ADJUSTABLE PRESSURE RANGE,4000-5000 PSI;W/ADJUSTMENT CAP IN; Media for Which Designed: AIR FIRST RESPONSE. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-449-5811 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.
What is the DEMIL code for NSN 4820-01-449-5811?
NSN 4820-01-449-5811 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.