The Retainer,crystal Holder, cataloged under National Stock Number 5955-00-644-0286, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-00-644-0286 |
| Item Name | Retainer,crystal Holder |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 3 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Overall Diameter | 2.750 INCHES NOMINAL IN |
| Precious Material | SILVER |
| Unthreaded Mounting Hole Diameter | 0.128 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Bolt Circle Diameter | 1.250 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Surface Treatment | SILVER |
| Precious Material and Location | SURFACE SILVER |
| Material | COPPER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 505-0897-003 | 3/2 Design control — primary reference U.S. Government activity |
| 505-0897-003 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 5050897003 | 5/9 Secondary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 5050897003 | 5/2 Secondary reference U.S. Government activity |
NSN 5955-00-644-0286 is a Retainer,crystal Holder, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
Key specifications for 5955-00-644-0286: Mounting Facility Type and Quantity: 3 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Diameter: 2.750 INCHES NOMINAL IN; Precious Material: SILVER; Unthreaded Mounting Hole Diameter: 0.128 INCHES NOMINAL SINGLE MOUNTING FACILITY IN. 8 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.