The Crystal Unit,quartz, cataloged under National Stock Number 5955-00-667-2671, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Bliley Technologies Inc. Government technical data includes 12 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5955-00-667-2671 |
| Primary Part Number | CR28 |
| Item Name | Crystal Unit,quartz |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Bliley Technologies Inc |
| Status | ACTIVE |
| Controlled Reference Temp | 75.0 CELSIUS DEGC |
| Frequency Tolerance for Operating Temp in Percent | -0.002 TO 0.002 |
| Terminal Diameter | 0.050 INCHES NOMINAL IN |
| Frequency Tolerance at Reference Temp in Percent | -0.0005 TO 0.0005 |
| Terminal Length | 0.238 INCHES NOMINAL IN |
| Mode of Oscillation | FUNDAMENTAL |
| Overall Thickness | 0.343 INCHES NOMINAL IN |
| Style Designator | OVAL BODY, PIN TERMINALS |
| Body Length | 0.765 INCHES NOMINAL IN |
| Center to Center Distance Between Terminals | 0.486 INCHES NOMINAL IN |
| Operating Temp Range | +70.0 TO 80.0 CELSIUS DEGC |
| Specified Frequency | 3.600 KILOHERTZ |
| 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 |
| Part Number | Manufacturer |
|---|---|
| CR28 PRIMARY | Bliley Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| CR28U | 3/1 Design control — primary reference U.S. Government activity |
| IULC3098TYPECR28U | 4/1 Identification reference U.S. Government activity |
| MS91384 | 4/1 Identification reference U.S. Government activity |
NSN 5955-00-667-2671 is a Crystal Unit,quartz, manufactured by Bliley Technologies Inc, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-00-667-2671 has 1 manufacturer part number on file: CR28 (Bliley Technologies Inc).
2 possible matches (shared part number, not a government interchangeability claim): 5955-00-667-3166, 3110-01-103-5362. Verify interchangeability with system specifications before substitution.
Key specifications for CR28: Controlled Reference Temp: 75.0 CELSIUS DEGC; Frequency Tolerance for Operating Temp in Percent: -0.002 TO 0.002; Terminal Diameter: 0.050 INCHES NOMINAL IN; Frequency Tolerance at Reference Temp in Percent: -0.0005 TO 0.0005. 12 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 5955-00-667-2671 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.