The Housing,gage, cataloged under National Stock Number 6620-00-409-4975, is classified within Federal Supply Class 6620 (Engine Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6620-00-409-4975
Item Name
Housing,gage
FSC / FSG
6620 / 66 — Engine Instruments
Status
ACTIVE
FSC Application Data
GAGE UNIT,ENGINE
Dial Window
INCLUDED
Dial Frame
INCLUDED
Material
COPPER ALLOY
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5945-00-731-9204POSSIBLE MATCH
RELAY,ELECTROMAGNETIC
Possible match (shared part number)
5962-01-336-8588POSSIBLE MATCH
MICROCIRCUIT,DIGITAL
Possible match (shared part number)
3040-01-356-363313-547-226POSSIBLE MATCH
BRAKE,MULTIPLE DISK
Possible match (shared part number)Chyron Corp Chyron Video Products Div
6625-01-374-324022801-009POSSIBLE MATCH
TEST SET,TELEPHONE
Possible match (shared part number)Chatsworth Products Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
22-801-1
3/2Design control — primary reference
U.S. Government activity
Related Parts
5945-00-731-9204POSSIBLE MATCH
RELAY,ELECTROMAGNETIC
5962-01-336-8588POSSIBLE MATCH
MICROCIRCUIT,DIGITAL
3040-01-356-3633POSSIBLE MATCH
BRAKE,MULTIPLE DISK
13-547-226
6625-01-374-3240POSSIBLE MATCH
TEST SET,TELEPHONE
22801-009
Frequently Asked Questions
What is NSN 6620-00-409-4975?
NSN 6620-00-409-4975 is a Housing,gage, classified under FSC 6620, Engine Instruments. Status: active.
What NSN replaces 6620-00-409-4975?
4 possible matches (shared part number, not a government interchangeability claim): 5945-00-731-9204, 5962-01-336-8588, 3040-01-356-3633. Verify interchangeability with system specifications before substitution.
What are the specifications of 6620-00-409-4975?
Key specifications for 6620-00-409-4975: FSC Application Data: GAGE UNIT,ENGINE; Dial Window: INCLUDED; Dial Frame: INCLUDED; Material: COPPER ALLOY. 4 specifications are documented in the U.S. Government catalog.
Is NSN 6620-00-409-4975 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.