Heat Exchanger, Air to Air, Aircra1660-01-691-6925
NSN 1660-01-691-6925 · NIIN 016916925 · Part number PWOB 35-60
Oil Air Hydraulics Inc. · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 62955
Government record, cited
NSN 1660-01-691-6925 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-691-6925. Manufacturer of record part number: PWOB 35-60.
Also searched as1660-01-691-6925 ·
1660016916925 ·
NIIN 016916925 ·
01-691-6925 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 62955 · PWOB 35-60
Nearby stock numbers← 1660-01-691-6421 Heat Exchanger, Fluid to Air
·
1660-01-691-7389 Heat Exchanger, Air to Air, Aircra →
Features
Heat Exchanger,air to Air,aircra — FSC 1660
1 manufacturer part number on file
Manufacturer of record: Oil Air Hydraulics Inc.
Identification
NSN: 1660-01-691-6925
NIIN: 016916925
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: PWOB 35-60
Manufacturer: Oil Air Hydraulics Inc.
General Description
The Heat Exchanger,air to Air,aircra, cataloged under National Stock Number 1660-01-691-6925, 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 Oil Air Hydraulics Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1660-01-691-6925
Primary Part Number
PWOB 35-60
Item Name
Heat Exchanger,air to Air,aircra
FSC / FSG
1660 / 16 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Other items in FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1660-00-001-1693
DUCT ASSEMBLY,AIR CONDITIONING-H
1660-00-001-1754
BAFFLE,AIR
1660-00-001-2491
CAGE,BYPASS VALVE
1660-00-001-2493
1660-00-001-2493 · Item name not on file
1660-00-001-2496
CONTROL BOX,ELECTRICAL-ELECTRONI
1660-00-001-2497
1660-00-001-2497 · Item name not on file
1660-00-001-4130
1660-00-001-4130 · Item name not on file
1660-00-001-4479
CONTROLLER,AIR PRESSURE,AIRCRAFT
Frequently Asked Questions
What is NSN 1660-01-691-6925?
NSN 1660-01-691-6925 is a Heat Exchanger,air to Air,aircra, manufactured by Oil Air Hydraulics Inc., classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-691-6925?
NSN 1660-01-691-6925 has 1 manufacturer part number on file: PWOB 35-60 (Oil Air Hydraulics Inc.).
What are the specifications of PWOB 35-60?
Key specifications for PWOB 35-60: Special Features: ADAPTER ASSEMBLY; Part Name Assigned by Controlling Agency: HEAT EXCHANGER. 0 specifications are documented in the U.S. Government catalog.
Is NSN 1660-01-691-6925 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 1660-01-691-6925?
NSN 1660-01-691-6925 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.