NSN 1660-01-139-5603 · NIIN 011395603 · Part number 221C645-11
East/west Industries, Inc. · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 30941
Government record, cited
NSN 1660-01-139-5603 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-139-5603. Manufacturer of record part number: 221C645-11.
Also searched as1660-01-139-5603 ·
1660011395603 ·
NIIN 011395603 ·
01-139-5603 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 30941 · 221C645-11
General Characteristics Item Description: CRES;CADMIUM PLATE,FINISH; 4.670 IN. LG IN
1 manufacturer part number on file
Manufacturer of record: East/west Industries, Inc.
Identification
NSN: 1660-01-139-5603
NIIN: 011395603
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: 221C645-11
Manufacturer: East/west Industries, Inc.
General Description
The Fitting,rear, cataloged under National Stock Number 1660-01-139-5603, 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 East/west Industries, Inc.. Government technical data includes 1 specification, 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
1660-01-139-5603
Primary Part Number
221C645-11
Item Name
Fitting,rear
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.
1660-00-006-4472
FLANGE,VALVE BODY
1660-00-009-5646
ADAPTER ASSEMBLY,BELLOWS
1660-00-019-8389
1660-00-019-8389 · Item name not on file
1660-00-019-8399
1660-00-019-8399 · Item name not on file
1660-00-031-5285
1660-00-031-5285 · Item name not on file
1660-00-302-4390
PISTON,REGULATING V
1660-00-441-0575
PISTON
1660-01-601-0729
ETHERNET SWITCH
Frequently Asked Questions
What is NSN 1660-01-139-5603?
NSN 1660-01-139-5603 is a Fitting,rear, manufactured by East/west Industries, Inc., classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-139-5603?
NSN 1660-01-139-5603 has 1 manufacturer part number on file: 221C645-11 (East/west Industries, Inc.).
What are the specifications of 221C645-11?
Key specifications for 221C645-11: General Characteristics Item Description: CRES;CADMIUM PLATE,FINISH; 4.670 IN. LG IN; End Item Identification: RIGID SEAT SURVIVAL KIT SKU-2/A. 1 specification is documented in the U.S. Government catalog.
Is NSN 1660-01-139-5603 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.