The Oscillator,crystal Controlled, cataloged under National Stock Number 5955-01-451-8631, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Seiko Epson Corporation. Government technical data includes 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5955-01-451-8631 |
| Primary Part Number | SG-615P-20.0000MC |
| Item Name | Oscillator,crystal Controlled |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Seiko Epson Corporation |
| Status | ACTIVE |
| Frequency Per Channel | 20.0 MEGAHERTZ NOMINAL OPERATING CHANNEL |
| Basic Shape Style | RECTANGULAR OR SQUARE |
| Material | PLASTIC ENCLOSURE |
| 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 |
|---|---|
| SG-615P-20.0000MC PRIMARY | Seiko Epson Corporation (JPN) |
| Reference | Meaning |
|---|---|
| SG-615P-20.0000MC | 3/9 Design control — primary reference Seiko Epson Corp. |
| 1813-0709 | 5/9 Secondary reference Hewlett-Packard Company Dba HP |
| 1813-0904 | C/1 Advisory reference — outside the item-of-supply concept Hewlett-Packard Company Dba HP |
NSN 5955-01-451-8631 is a Oscillator,crystal Controlled, manufactured by Seiko Epson Corporation, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-01-451-8631 has 1 manufacturer part number on file: SG-615P-20.0000MC (Seiko Epson Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5962-01-471-4419. Verify interchangeability with system specifications before substitution.
Key specifications for SG-615P-20.0000MC: Overall Height: 4.7 MILLIMETERS NOMINAL MM; Frequency Per Channel: 20.0 MEGAHERTZ NOMINAL OPERATING CHANNEL; Overall Length: 14.0 MILLIMETERS NOMINAL MM; Overall Width: 9.8 MILLIMETERS NOMINAL MM. 3 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.