NSN 5955-01-173-1797 — this item is cataloged by the U.S. Government under National Stock Number 5955-01-173-1797. Manufacturer of record part number: HC18U.
Also searched as5955-01-173-1797 ·
5955011731797 ·
NIIN 011731797 ·
01-173-1797 ·
FSC 5955 Oscillators and Piezoelectric Crystals · CAGE 59660 · HC18U · 5001-319
FSC: 5955 — Oscillators and Piezoelectric Crystals
FSG: 59 — Electrical and Electronic Equipment Components
Primary part number: HC18U
Manufacturer: Tusonix, Llc
General Description
The Holder,crystal Unit, cataloged under National Stock Number 5955-01-173-1797, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Tusonix, Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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
5955-01-173-1797
Primary Part Number
HC18U
Item Name
Holder,crystal Unit
FSC / FSG
5955 / 59 — Oscillators and Piezoelectric Crystals
Manufacturer
Tusonix, Llc
Status
ACTIVE
Material
METAL
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 Items2
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5955-01-308-9562HC-18/UPOSSIBLE MATCH
CRYSTAL UNIT,QUARTZ
Possible match (shared part number)Spirent Systems Wichita, Inc.
1630-01-492-77395001319POSSIBLE MATCH
KIT BALANCE
Possible match (shared part number)Meggitt Aircraft Braking Systems Corporation
NSN 5955-01-173-1797 is a Holder,crystal Unit, manufactured by Tusonix, Llc, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
What part numbers are listed for NSN 5955-01-173-1797?
NSN 5955-01-173-1797 has 2 manufacturer part numbers on file: HC18U (Tusonix, Llc), 5001-319 (Raytheon Company Div Rmd Strategic).
What NSN replaces 5955-01-173-1797?
2 possible matches (shared part number, not a government interchangeability claim): 5955-01-308-9562, 1630-01-492-7739. Verify interchangeability with system specifications before substitution.
What are the specifications of HC18U?
Key specifications for HC18U: Material: METAL. 1 specification is documented in the U.S. Government catalog.
Is NSN 5955-01-173-1797 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.