NSN 1660-01-539-0528 · NIIN 015390528 · Part number 4604-001-03
Mission Systems Orchard Park Inc · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 04577
Government record, cited
NSN 1660-01-539-0528 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-539-0528. Manufacturer of record part number: 4604-001-03.
Also searched as1660-01-539-0528 ·
1660015390528 ·
NIIN 015390528 ·
01-539-0528 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 04577 · 4604-001-03
Manufacturer of record: Mission Systems Orchard Park Inc
Identification
NSN: 1660-01-539-0528
NIIN: 015390528
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: 4604-001-03
Manufacturer: Mission Systems Orchard Park Inc
General Description
The Regulator,emergency Oxygen, cataloged under National Stock Number 1660-01-539-0528, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. The manufacturer of record is Mission Systems Orchard Park Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 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
1660-01-539-0528
Primary Part Number
4604-001-03
Item Name
Regulator,emergency Oxygen
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Manufacturer
Mission Systems Orchard Park Inc
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL Q — CCL Item — Commerce Control List
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
F
⇄Related Items3
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-01-539-34414104-005-01POSSIBLE MATCH
DIAPHRAGM,ACTUATOR VALVE,SPECIAL
Possible match (shared part number)Mission Systems Orchard Park Inc
4730-01-539-34894117-005-01POSSIBLE MATCH
ADAPTER,STRAIGHT,FLANGE TO TUBE
Possible match (shared part number)Mission Systems Orchard Park Inc
NSN 1660-01-539-0528 is a Regulator,emergency Oxygen, manufactured by Mission Systems Orchard Park Inc, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-539-0528?
NSN 1660-01-539-0528 has 1 manufacturer part number on file: 4604-001-03 (Mission Systems Orchard Park Inc).
What NSN replaces 1660-01-539-0528?
3 possible matches (shared part number, not a government interchangeability claim): 4820-01-539-3441, 4730-01-539-3489, 4820-01-539-4418. Verify interchangeability with system specifications before substitution.
What are the specifications of 4604-001-03?
Key specifications for 4604-001-03: Part Name Assigned by Controlling Agency: REGULATOR/SOLENOID; End Item Identification: EMERGENCY OXYGEN BOTTLE; V22 AIRCRAFT. 0 specifications are documented in the U.S. Government catalog.
Is NSN 1660-01-539-0528 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 1660-01-539-0528?
NSN 1660-01-539-0528 has DEMIL Code Q. 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.