NSN 4820-00-348-1859 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-348-1859. Manufacturer of record part number: 525-35.
Also searched as4820-00-348-1859 ·
4820003481859 ·
NIIN 003481859 ·
00-348-1859 ·
FSC 4820 Valves, Nonpowered · CAGE 45934 · 525-35
Manufacturer of record: Ontic Engineering & Manufacturing, Inc Dba Ontic Us
Identification
NSN: 4820-00-348-1859
NIIN: 003481859
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 525-35
Manufacturer: Ontic Engineering & Manufacturing, Inc Dba Ontic Us
General Description
The Disk,valve, cataloged under National Stock Number 4820-00-348-1859, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-348-1859
Primary Part Number
525-35
Item Name
Disk,valve
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
Status
ACTIVE
Outside Diameter
0.562 INCHES NOMINAL IN
Material
STEEL
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 Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5340-00-973-03345253-5POSSIBLE MATCH
BRACKET,DOUBLE ANGLE
Possible match (shared part number)Goodrich Aerospace Canada Ltd
5998-01-115-6206190-5897-001POSSIBLE MATCH
CIRCUIT CARD ASSEMBLY
Possible match (shared part number)Shugart Corp Dba Intl Assembly Specialists
5998-01-358-2642POSSIBLE MATCH
ELECTRONIC COMPONENTS ASSEMBLY
Possible match (shared part number)
5342-01-422-448452535POSSIBLE MATCH
MOUNT,RESILIENT,WEAPON SYSTEM
Possible match (shared part number)Black Engineering Sales Co
Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA)
Reference documents
Reference
Meaning
525-35
5/9Secondary reference
Donallco Inc
Related Parts
5340-00-973-0334POSSIBLE MATCH
BRACKET,DOUBLE ANGLE
5253-5
5998-01-115-6206POSSIBLE MATCH
CIRCUIT CARD ASSEMBLY
190-5897-001
5998-01-358-2642POSSIBLE MATCH
ELECTRONIC COMPONENTS ASSEMBLY
5342-01-422-4484POSSIBLE MATCH
MOUNT,RESILIENT,WEAPON SYSTEM
52535
Frequently Asked Questions
What is NSN 4820-00-348-1859?
NSN 4820-00-348-1859 is a Disk,valve, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-348-1859?
NSN 4820-00-348-1859 has 1 manufacturer part number on file: 525-35 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
What NSN replaces 4820-00-348-1859?
4 possible matches (shared part number, not a government interchangeability claim): 5340-00-973-0334, 5998-01-115-6206, 5998-01-358-2642. Verify interchangeability with system specifications before substitution.
What are the specifications of 525-35?
Key specifications for 525-35: Overall Height: 1.828 INCHES NOMINAL IN; Outside Diameter: 0.562 INCHES NOMINAL IN; Material: STEEL. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-348-1859 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.