The Oscillator,crystal Controlled, cataloged under National Stock Number 5955-01-166-2997, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Xsis Electronics Inc. Government technical data includes 14 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. 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 | 5955-01-166-2997 |
| Primary Part Number | X143-40MHZ |
| Item Name | Oscillator,crystal Controlled |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Xsis Electronics Inc |
| Status | ACTIVE |
| Circuit Construction Type | SOLID STATE |
| Inclosure Type | HERMETICALLY SEALED |
| Control Type | LOCAL |
| Frequency Per Channel | 40.0 MEGAHERTZ NOMINAL OPERATING CHANNEL |
| Connection Type | PIN BOTTOM |
| Connection Contact Type and Quantity | 14 PIN EXTERNAL |
| Operating Control Method | AUTOMATIC |
| Basic Shape Style | RECTANGULAR OR SQUARE |
| Identification Designator | X143-40MHZ-57051 MHz |
| Average Life Measurement | NOT RATED |
| Environmental Protection | SHOCK RESISTANT AND VIBRATION |
| Operating Temp Range | -55.0 TO 125.0 CELSIUS DEGC |
| Installation Design | MODULE |
| External DC Operating Voltage in Volts | 5.0 NOMINAL SINGLE VOLTAGE |
| 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 |
|---|---|
| X143-40MHZ PRIMARY | Xsis Electronics Inc (USA) |
NSN 5955-01-166-2997 is a Oscillator,crystal Controlled, manufactured by Xsis Electronics Inc, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-166-2997 has 1 manufacturer part number on file: X143-40MHZ (Xsis Electronics Inc).
1 possible match (shared part number, not a government interchangeability claim): 5955-01-284-6327. Verify interchangeability with system specifications before substitution.
Key specifications for X143-40MHZ: Circuit Construction Type: SOLID STATE; Overall Height: 0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN; Inclosure Type: HERMETICALLY SEALED; Control Type: LOCAL. 14 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.
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.