PartsTable TECHNICAL DATA SHEET

NSN 6620-01-672-0657Government record, cited

Indicator, Electrical Tachometer6620-01-672-0657

NSN 6620-01-672-0657 · NIIN 016720657 · Part number 160399-1

Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems · FSC 6620 — Engine Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 50027

Government record, cited

NSN 6620-01-672-0657 — this item is cataloged by the U.S. Government under National Stock Number 6620-01-672-0657. Manufacturer of record part number: 160399-1.

Also searched as 6620-01-672-0657 · 6620016720657 · NIIN 016720657 · 01-672-0657 · FSC 6620 Engine Instruments · CAGE 50027 · 160399-1 · 6620PL1934665 · 7741-440

Nearby stock numbers ← 6620-01-672-0642 Indicator, Electrical Tachometer · 6620-01-672-0669 Indicator, Electrical Tachometer →

Features

Indicator,electrical Tachometer — FSC 6620
2 manufacturer part numbers on file
Manufacturer of record: Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems

Identification

NSN: 6620-01-672-0657
NIIN: 016720657
FSC: 6620 — Engine Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: 160399-1
Manufacturer: Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems

General Description

The Indicator,electrical Tachometer, cataloged under National Stock Number 6620-01-672-0657, is classified within Federal Supply Class 6620 (Engine Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.

Catalog Facts

Item Name	Indicator,electrical Tachometer
FSC / FSG	6620 — Engine Instruments (FSG 66)
Manufacturers	Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems (CAGE 50027)

Technical Specifications

Parameter	Value
NSN	6620-01-672-0657
Primary Part Number	160399-1
Item Name	Indicator,electrical Tachometer
FSC / FSG	6620 / 66 — Engine Instruments
Manufacturer	Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems
Status	ACTIVE

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

Part Number	Manufacturer
160399-1 PRIMARY	Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems (USA)
7741-440	Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems (USA)

Reference documents

Reference	Meaning
6620PL1934665	6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index

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 6620-01-672-0657?

NSN 6620-01-672-0657 is a Indicator,electrical Tachometer, manufactured by Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems, classified under FSC 6620, Engine Instruments. Status: active.

What part numbers are listed for NSN 6620-01-672-0657?

NSN 6620-01-672-0657 has 2 manufacturer part numbers on file: 160399-1 (Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems), 7741-440 (Undersea Sensor Systems Inc Div Ultra Sonobuoy Systems).

Is NSN 6620-01-672-0657 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.

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