The Crystal Unit,quartz, cataloged under National Stock Number 5955-01-107-8909, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 7 specifications, 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 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 | 5955-01-107-8909 |
| Primary Part Number | GC888D1 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.002 TO 0.002 |
| Terminal Length | 0.812 INCHES NOMINAL IN |
| Mode of Oscillation | FUNDAMENTAL |
| Overall Thickness | 0.177 INCHES NOMINAL IN |
| Style Designator | OVAL BODY, WIRE LEADS |
| Operating Temp Range | -30.0 TO 70.0 CELSIUS DEGC |
| Specified Frequency | 20.000 MEGAHERTZ |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5955-01-107-8909 is a Crystal Unit,quartz, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-107-8909 has 2 manufacturer part numbers on file: GC888D1 (Northrop Grumman Systems Corporation), MP200 (Cts Inc).
1 possible match (shared part number, not a government interchangeability claim): 9905-01-387-3616. Verify interchangeability with system specifications before substitution.
Key specifications for GC888D1: Frequency Tolerance for Operating Temp in Percent: -0.002 TO 0.002; Terminal Length: 0.812 INCHES NOMINAL IN; Mode of Oscillation: FUNDAMENTAL; Overall Thickness: 0.177 INCHES NOMINAL IN. 7 specifications are 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.
NSN 5955-01-107-8909 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.