The Valve,safety Relief, cataloged under National Stock Number 4820-01-199-6630, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Catalog Facts
Item Name
Valve,safety Relief
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Technical Specifications
Parameter
Value
NSN
4820-01-199-6630
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
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
⇄Related Items3
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
3110-01-394-328028009-1POSSIBLE MATCH
BEARING,BALL,ANNULAR
Possible match (shared part number)Regal-Beloit Corporation Dba Fasco Group Div Cassville Division
4820-01-419-2537283388-0008 ITEM 5POSSIBLE MATCH
VALVE,REGULATING,FLUID PRESSURE
Possible match (shared part number)Marotta Controls Inc
5850-01-434-038528009-1POSSIBLE MATCH
LENS,LIGHT
Possible match (shared part number)Drs Advanced Isr, Llc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
280091-0004
3/2Design control — primary reference
U.S. Government activity
280091
D/9Drawing number reference only
U.S. Government activity
Related Parts
3110-01-394-3280POSSIBLE MATCH
BEARING,BALL,ANNULAR
28009-1
4820-01-419-2537POSSIBLE MATCH
VALVE,REGULATING,FLUID PRESSURE
283388-0008 ITEM 5
5850-01-434-0385POSSIBLE MATCH
LENS,LIGHT
28009-1
Frequently Asked Questions
What is NSN 4820-01-199-6630?
NSN 4820-01-199-6630 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-199-6630?
3 possible matches (shared part number, not a government interchangeability claim): 3110-01-394-3280, 4820-01-419-2537, 5850-01-434-0385. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-199-6630 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.