The Parts Kit,safety Relief Valve, cataloged under National Stock Number 4820-01-129-8976, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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
Parts Kit,safety Relief Valve
FSC / FSG
4820 — Valves, Nonpowered (FSG 48)
Technical Specifications
Parameter
Value
NSN
4820-01-129-8976
Item Name
Parts Kit,safety Relief Valve
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)
⇄Related Items3
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4460-01-204-5817104900POSSIBLE MATCH
TUBE,HIGH VOLTAGE
Possible match (shared part number)Air Systems Components Inc Dba Air System Components Inc Div Trion Iaq Div
6605-01-377-005110-4900POSSIBLE MATCH
COMPUTER,NAVIGATIONAL
Possible match (shared part number)L3 Technologies, Inc.
6930-01-530-444010-4900POSSIBLE MATCH
INDICATOR SIMULATED
Possible match (shared part number)Simtek, Inc. Dba Simtek Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
104900
3/2Design control — primary reference
U.S. Government activity
Related Parts
4460-01-204-5817POSSIBLE MATCH
TUBE,HIGH VOLTAGE
104900
6605-01-377-0051POSSIBLE MATCH
COMPUTER,NAVIGATIONAL
10-4900
6930-01-530-4440POSSIBLE MATCH
INDICATOR SIMULATED
10-4900
Frequently Asked Questions
What is NSN 4820-01-129-8976?
NSN 4820-01-129-8976 is a Parts Kit,safety Relief Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-129-8976?
3 possible matches (shared part number, not a government interchangeability claim): 4460-01-204-5817, 6605-01-377-0051, 6930-01-530-4440. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-129-8976 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.