NSN 1660-01-412-9938 · NIIN 014129938 · Part number 7535-709-440
Velan Valve Corp. · FSC 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment · FSG 16 — Aircraft Components and Accessories · CAGE 57574
Government record, cited
NSN 1660-01-412-9938 — this item is cataloged by the U.S. Government under National Stock Number 1660-01-412-9938. Manufacturer of record part number: 7535-709-440.
Also searched as1660-01-412-9938 ·
1660014129938 ·
NIIN 014129938 ·
01-412-9938 ·
FSC 1660 Aircraft Air Conditioning, Heating, and Pressurizing Equipment · CAGE 57574 · 7535-709-440
Nearby stock numbers← 1660-01-412-9884 Coalescor, Water Seperator
·
1660-01-413-0543 Duct Assembly, Air Conditioning-H →
Features
Disk,valve — FSC 1660
Style Designator: POPPET
Inside Diameter: 4.750 INCHES NOMINAL IN
Media for Which Designed: LIQUID
Material: STEEL
1 manufacturer part number on file
Manufacturer of record: Velan Valve Corp.
Identification
NSN: 1660-01-412-9938
NIIN: 014129938
FSC: 1660 — Aircraft Air Conditioning, Heating, and Pressurizing Equipment
FSG: 16 — Aircraft Components and Accessories
Primary part number: 7535-709-440
Manufacturer: Velan Valve Corp.
General Description
The Disk,valve, cataloged under National Stock Number 1660-01-412-9938, 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 Velan Valve Corp.. Government technical data includes 4 specifications, 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
1660-01-412-9938
Primary Part Number
7535-709-440
Item Name
Disk,valve
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 1660-01-412-9938?
NSN 1660-01-412-9938 is a Disk,valve, manufactured by Velan Valve Corp., classified under FSC 1660, Aircraft Air Conditioning, Heating, and Pressurizing Equipment. Status: active.
What part numbers are listed for NSN 1660-01-412-9938?
NSN 1660-01-412-9938 has 1 manufacturer part number on file: 7535-709-440 (Velan Valve Corp.).
What are the specifications of 7535-709-440?
Key specifications for 7535-709-440: Style Designator: POPPET; Inside Diameter: 4.750 INCHES NOMINAL IN; Media for Which Designed: LIQUID; Material: STEEL. 4 specifications are documented in the U.S. Government catalog.
Is NSN 1660-01-412-9938 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.