PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

663Connector,oxygen Li

Air-Lock, Incorporated · NSN 1660-00-799-5231 · FSC 1660 · No Item Name Available
Verified by PartsTable
NSN 1660-00-799-5231 — this item is cataloged by the U.S. Government under National Stock Number 1660-00-799-5231. Primary manufacturer part number: 663.
Features
  • Connector,oxygen Li — FSC 1660
  • 1 verified cross-reference
  • Primary manufacturer: Air-Lock, Incorporated
Applications
  • Electrical interconnection
  • Signal interface mating
  • Quick-disconnect coupling
General Description

The Connector,oxygen Li, cataloged under National Stock Number 1660-00-799-5231, is classified within Federal Supply Class 1660 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Air-Lock, Incorporated. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameConnector,oxygen Li
FSC / FSG1660 — No Item Name Available (FSG 16)
ManufacturersAir-Lock, Incorporated (CAGE 97375)
Technical Specifications
ParameterValue
NSN1660-00-799-5231
Primary Part Number663
Item NameConnector,oxygen Li
FSC / FSG1660 / 16 — No Item Name Available
ManufacturerAir-Lock, Incorporated
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5340-00-066-1457350.663.012 INTERCHANGEABLE
Clamp,bridge
Weil Pump Co Inc
5920-00-069-7614663 INTERCHANGEABLE
Adapter,fuse
Cooper Bussmann, Llc Dba Cooper Industries
3110-00-100-0670663 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
6625-00-149-6298 INTERCHANGEABLE
Multimeter
5975-00-194-8870 INTERCHANGEABLE
Junction Box
4925-00-344-798166346PC90 INTERCHANGEABLE
Bolt Assy,eye
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
1650-00-347-1184 INTERCHANGEABLE
Cylinder Assembly,actuating,line
4910-00-351-9731682 INTERCHANGEABLE
Grinding Machine,valve Face
Sioux Tools Inc
5910-00-493-6471 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
5210-00-517-8096 INTERCHANGEABLE
Gage,thickness
Cross-Reference Index
Part NumberManufacturer
663 PRIMARY Air-Lock, Incorporated (USA)
Related Parts
5340-00-066-1457INTERCHANGEABLE
CLAMP,BRIDGE
350.663.012
5920-00-069-7614INTERCHANGEABLE
ADAPTER,FUSE
663
3110-00-100-0670INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
663
6625-00-149-6298INTERCHANGEABLE
MULTIMETER
5975-00-194-8870INTERCHANGEABLE
JUNCTION BOX
4925-00-344-7981INTERCHANGEABLE
BOLT ASSY,EYE
66346PC90
1650-00-347-1184INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
4910-00-351-9731INTERCHANGEABLE
GRINDING MACHINE,VALVE FACE
682
5910-00-493-6471INTERCHANGEABLE
CAPACITOR,FIXED,PLASTIC DIELECTR
5210-00-517-8096INTERCHANGEABLE
GAGE,THICKNESS
5330-00-716-1502INTERCHANGEABLE
SEAL,PLAIN ENCASED
43500
5120-00-876-7979INTERCHANGEABLE
WRENCH,SPECIAL
66-3

Frequently Asked Questions

What is NSN 1660-00-799-5231?

NSN 1660-00-799-5231 is a Connector,oxygen Li, manufactured by Air-Lock, Incorporated, classified under FSC 1660 (No Item Name Available). Status: active.

What are the part numbers for NSN 1660-00-799-5231?

NSN 1660-00-799-5231 has 1 cross-referenced part number: 663 (Air-Lock, Incorporated).

What NSN replaces 1660-00-799-5231?

There are 12 known substitutes for 1660-00-799-5231: 5340-00-066-1457, 5920-00-069-7614, 3110-00-100-0670 and 9 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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