The Indicator,electrical Tachometer, cataloged under National Stock Number 6620-01-399-3602, is classified within Federal Supply Class 6620 (Engine Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6620-01-399-3602
Item Name
Indicator,electrical Tachometer
FSC / FSG
6620 / 66 — Engine Instruments
Status
ACTIVE
Length
5.500 INCHES NOMINAL IN
Diameter
2.000 INCHES NOMINAL IN
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
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
H2901-417
3/9Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 6620 — Engine Instruments
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6620-00-000-0124
6620-00-000-0124 · Item name not on file
6620-00-000-0548
6620-00-000-0548 · Item name not on file
6620-00-001-1398
STARTER AND SHAFT ASSEMBLY
6620-00-001-4552
6620-00-001-4552 · Item name not on file
6620-00-001-9331
6620-00-001-9331 · Item name not on file
6620-00-001-9332
6620-00-001-9332 · Item name not on file
6620-00-001-9333
6620-00-001-9333 · Item name not on file
6620-00-001-9334
6620-00-001-9334 · Item name not on file
Frequently Asked Questions
What is NSN 6620-01-399-3602?
NSN 6620-01-399-3602 is a Indicator,electrical Tachometer, classified under FSC 6620, Engine Instruments. Status: active.
What are the specifications of 6620-01-399-3602?
Key specifications for 6620-01-399-3602: Length: 5.500 INCHES NOMINAL IN; Diameter: 2.000 INCHES NOMINAL IN. 2 specifications are documented in the U.S. Government catalog.
Is NSN 6620-01-399-3602 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.