FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
FSG: 66 — Instruments and Laboratory Equipment
General Description
The Disc,altimeter, cataloged under National Stock Number 6685-00-166-7228, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government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
Disc,altimeter
FSC / FSG
6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66)
Technical Specifications
Parameter
Value
NSN
6685-00-166-7228
Item Name
Disc,altimeter
FSC / FSG
6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
⇄Related Items5
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5950-00-919-4420662-0175-010POSSIBLE MATCH
TRANSFORMER,POWER
Possible match (shared part number)Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
4820-01-234-250037176POSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)Ausco Products Inc
4820-01-305-9793POSSIBLE MATCH
VALVE,SAFETY RELIEF
Possible match (shared part number)
5998-01-421-922537176POSSIBLE MATCH
CIRCUIT CARD ASSEMBLY
Possible match (shared part number)U S Dept of Transportation Federal Aviation Administration
5310-01-682-385237176POSSIBLE MATCH
NUT,SELF-LOCKING,HEXAGON
Possible match (shared part number)Fastenal Company Dba Fastenal Co
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
371-76
3/2Design control — primary reference
U.S. Government activity
Related Parts
5950-00-919-4420POSSIBLE MATCH
TRANSFORMER,POWER
662-0175-010
4820-01-234-2500POSSIBLE MATCH
VALVE,SAFETY RELIEF
37176
4820-01-305-9793POSSIBLE MATCH
VALVE,SAFETY RELIEF
5998-01-421-9225POSSIBLE MATCH
CIRCUIT CARD ASSEMBLY
37176
5310-01-682-3852POSSIBLE MATCH
NUT,SELF-LOCKING,HEXAGON
37176
Frequently Asked Questions
What is NSN 6685-00-166-7228?
NSN 6685-00-166-7228 is a Disc,altimeter, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
What NSN replaces 6685-00-166-7228?
5 possible matches (shared part number, not a government interchangeability claim): 5950-00-919-4420, 4820-01-234-2500, 4820-01-305-9793. Verify interchangeability with system specifications before substitution.
Is NSN 6685-00-166-7228 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). 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.