The Parts Kit,safety Relief Valve, cataloged under National Stock Number 4820-01-424-0403, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
4820-01-424-0403
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)
Criticality Code
X
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-460-0805302D330-002POSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Northrop Grumman Systems Corporation Div Marine Systems
4820-01-464-5043302D330-08POSSIBLE MATCH
SUBPLATE ASSEMBLY,VALVE
Possible match (shared part number)Pella Corp
5305-01-642-7715359-15220-0POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division
5340-01-642-8681488-35013-0POSSIBLE MATCH
PLUG,LEAKPROOF SEAL
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division
5360-01-642-8967036-85514-0POSSIBLE MATCH
SPRING,HELICAL,COMPRESSION
Possible match (shared part number)Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
302D330G05
5/9Secondary reference
U.S. Government activity
6D61348-001
3/2Design control — primary reference
U.S. Government activity
302D330 ITEM 1
5/9Secondary reference
U.S. Government activity
302D330
D/9Drawing number reference only
U.S. Government activity
Related Parts
4820-01-460-0805POSSIBLE MATCH
VALVE,SAFETY RELIEF
302D330-002
4820-01-464-5043POSSIBLE MATCH
SUBPLATE ASSEMBLY,VALVE
302D330-08
5305-01-642-7715POSSIBLE MATCH
SCREW,CAP,SOCKET HEAD
359-15220-0
5340-01-642-8681POSSIBLE MATCH
PLUG,LEAKPROOF SEAL
488-35013-0
5360-01-642-8967POSSIBLE MATCH
SPRING,HELICAL,COMPRESSION
036-85514-0
Frequently Asked Questions
What is NSN 4820-01-424-0403?
NSN 4820-01-424-0403 is a Parts Kit,safety Relief Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
What NSN replaces 4820-01-424-0403?
5 possible matches (shared part number, not a government interchangeability claim): 4820-01-460-0805, 4820-01-464-5043, 5305-01-642-7715. Verify interchangeability with system specifications before substitution.
Is NSN 4820-01-424-0403 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.