PartsTable TECHNICAL DATA SHEET

NSN 6645-01-595-3364Government record, cited

Hourmeter, Spec6645-01-595-3364

NSN 6645-01-595-3364 · NIIN 015953364 · Part number C664503-0103

Textron Aviation Inc · FSC 6645 — Time Measuring Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 7EK50

Government record, cited

NSN 6645-01-595-3364 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-595-3364. Manufacturer of record part number: C664503-0103.

Also searched as 6645-01-595-3364 · 6645015953364 · NIIN 015953364 · 01-595-3364 · FSC 6645 Time Measuring Instruments · CAGE 7EK50 · C664503-0103

Nearby stock numbers ← 6645-01-595-1160 Recorder, Time · 6645-01-595-3945 Meter, Time Totalizing →

Features

Hourmeter,spec — FSC 6645
1 manufacturer part number on file
Manufacturer of record: Textron Aviation Inc

Identification

NSN: 6645-01-595-3364
NIIN: 015953364
FSC: 6645 — Time Measuring Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: C664503-0103
Manufacturer: Textron Aviation Inc

General Description

The Hourmeter,spec, cataloged under National Stock Number 6645-01-595-3364, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Textron Aviation Inc. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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	Hourmeter,spec
FSC / FSG	6645 — Time Measuring Instruments (FSG 66)
Manufacturers	Textron Aviation Inc (CAGE 7EK50)

Technical Specifications

Parameter	Value
NSN	6645-01-595-3364
Primary Part Number	C664503-0103
Item Name	Hourmeter,spec
FSC / FSG	6645 / 66 — Time Measuring Instruments
Manufacturer	Textron Aviation Inc
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)

Cross-Reference Index

Part Number	Manufacturer
C664503-0103 PRIMARY	Textron Aviation Inc (USA)

Reference documents

Reference	Meaning
C664503-0103	3/9 Design control — primary reference Cessna Aircraft Company Dba Textron Aviation

No interchangeability data on file.

Other items in FSC 6645 — Time Measuring Instruments

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

6645-00-001-1256

6645-00-001-1256 · Item name not on file

6645-00-001-4498

6645-00-001-4498 · Item name not on file

6645-00-001-4584

6645-00-001-4584 · Item name not on file

6645-00-001-9400

METER,TIME TOTALIZING

6645-00-003-0327

6645-00-003-0327 · Item name not on file

6645-00-003-0328

6645-00-003-0328 · Item name not on file

6645-00-003-0337

6645-00-003-0337 · Item name not on file

6645-00-003-0338

METER,TIME TOTALIZING

Frequently Asked Questions

What is NSN 6645-01-595-3364?

NSN 6645-01-595-3364 is a Hourmeter,spec, manufactured by Textron Aviation Inc, classified under FSC 6645, Time Measuring Instruments. Status: active.

What part numbers are listed for NSN 6645-01-595-3364?

NSN 6645-01-595-3364 has 1 manufacturer part number on file: C664503-0103 (Textron Aviation Inc).

Is NSN 6645-01-595-3364 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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