The Synchronized Clock, cataloged under National Stock Number 6645-01-356-8252, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Safran Trusted 4d Inc.. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6645-01-356-8252 |
| Primary Part Number | 8171 |
| Item Name | Synchronized Clock |
| FSC / FSG | 6645 / 66 — Time Measuring Instruments |
| Manufacturer | Safran Trusted 4d Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | LENGTH 19.000 IN; WIDTH 13.000 IN; HEIGHT 3.500 IN; FIVE DIGIT COUNTER; FIVE CONNECTORS; ONE FUSE; ONE MALE PLUG WITH GROUND; TWO JACKS; ONE TOGGLE SWITCH IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 8171 PRIMARY | Safran Trusted 4d Inc. (USA) |
NSN 6645-01-356-8252 is a Synchronized Clock, manufactured by Safran Trusted 4d Inc., classified under FSC 6645, Time Measuring Instruments. Status: active.
NSN 6645-01-356-8252 has 1 manufacturer part number on file: 8171 (Safran Trusted 4d Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6220-01-582-6945. Verify interchangeability with system specifications before substitution.
Key specifications for 8171: General Characteristics Item Description: LENGTH 19.000 IN; WIDTH 13.000 IN; HEIGHT 3.500 IN; FIVE DIGIT COUNTER; FIVE CONNECTORS; ONE FUSE; ONE MALE PLUG WITH GROUND; TWO JACKS; ONE TOGGLE SWITCH IN. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.