The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-129-8772, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5955-00-129-8772 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Status | ACTIVE |
| Frequency Tolerance for Operating Temp in Percent | -0.020 TO 0.020 |
| Terminal Diameter | 0.091 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN |
| Terminal Length | 0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN |
| Mode of Oscillation | FUNDAMENTAL |
| Overall Thickness | 0.4275 INCHES MINIMUM AND 0.4575 INCHES MAXIMUM IN |
| Style Designator | RECTANGULAR BODY, PIN TERMINALS |
| Body Length | 1.062 INCHES NOMINAL IN |
| Center to Center Distance Between Terminals | 0.483 INCHES MINIMUM AND 0.489 INCHES MAXIMUM IN |
| Operating Temp Range | -40.0 TO 70.0 CELSIUS DEGC |
| Specified Frequency | 1.017708 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 |
| Reference | Meaning |
|---|---|
| CR4U | 5/9 Secondary reference Inficon Edc Inc. |
| 71-3021-CR4U1.017708MHZ | 3/2 Design control — primary reference U.S. Government activity |
NSN 5955-00-129-8772 is a Crystal Unit,quartz, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5955-00-129-8777, 5955-00-129-8794. Verify interchangeability with system specifications before substitution.
Key specifications for 5955-00-129-8772: Frequency Tolerance for Operating Temp in Percent: -0.020 TO 0.020; Terminal Diameter: 0.091 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN; Terminal Length: 0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN; Mode of Oscillation: FUNDAMENTAL. 10 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 5955-00-129-8772 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.