FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories
Government record, cited
Also searched as1660-00-925-7529 ·
1660009257529 ·
NIIN 009257529 ·
00-925-7529 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
General Description
The Piston,first Stage, cataloged under National Stock Number 1660-00-925-7529, is classified within Federal Supply Class 1660 (Aircraft Air Conditioning, Heating, and Pressurizing Equipment) of the Aircraft Components and Accessories group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government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
Piston,first Stage
FSC / FSG
1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment (FSG 16)
Technical Specifications
Parameter
Value
NSN
1660-00-925-7529
Item Name
Piston,first Stage
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL B — Remove Demilitarization Key Points
Hazard
No hazard code in the DLA record (HMIC N)
⇄Related Items7
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5970-00-963-1619POSSIBLE MATCH
INSULATOR,PLATE
Possible match (shared part number)
5330-01-011-15187091POSSIBLE MATCH
PACKING,PREFORMED
Possible match (shared part number)Lawler Manufacturing Company, Inc.
5330-01-248-27137091POSSIBLE MATCH
SEAL,NONMETALLIC SPECIAL SHAPED
Possible match (shared part number)Kirkhill Inc Div Kirkhill Inc, Haskon Division
4210-01-252-163224459NPOSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
Possible match (shared part number)Tyco Fire Products Lp
5905-01-315-1412POSSIBLE MATCH
RESISTOR NETWORK,FIXED,FILM
Possible match (shared part number)
2540-01-393-4573708140POSSIBLE MATCH
MIRROR ASSEMBLY,REARVIEW
Possible match (shared part number)Velvac Inc
5935-01-554-4869POSSIBLE MATCH
CONNECTOR,PLUG,ELECTRICAL
Possible match (shared part number)
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
7091
3/2Design control — primary reference
U.S. Government activity
Related Parts
5970-00-963-1619POSSIBLE MATCH
INSULATOR,PLATE
5330-01-011-1518POSSIBLE MATCH
PACKING,PREFORMED
7091
5330-01-248-2713POSSIBLE MATCH
SEAL,NONMETALLIC SPECIAL SHAPED
7091
4210-01-252-1632POSSIBLE MATCH
HOSE ASSEMBLY,NONMETALLIC
24459N
5905-01-315-1412POSSIBLE MATCH
RESISTOR NETWORK,FIXED,FILM
2540-01-393-4573POSSIBLE MATCH
MIRROR ASSEMBLY,REARVIEW
708140
5935-01-554-4869POSSIBLE MATCH
CONNECTOR,PLUG,ELECTRICAL
Frequently Asked Questions
What is NSN 1660-00-925-7529?
NSN 1660-00-925-7529 is a Piston,first Stage, classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What NSN replaces 1660-00-925-7529?
7 possible matches (shared part number, not a government interchangeability claim): 5970-00-963-1619, 5330-01-011-1518, 5330-01-248-2713. Verify interchangeability with system specifications before substitution.
Is NSN 1660-00-925-7529 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 1660-00-925-7529?
NSN 1660-00-925-7529 has DEMIL Code B. 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.