The Holder,crystal Unit, cataloged under National Stock Number 5955-00-400-8145, is classified within Federal Supply Class 5955 (Oscillators and Piezoelectric Crystals) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5955-00-400-8145 |
| Primary Part Number | 2620691 |
| Item Name | Holder,crystal Unit |
| FSC / FSG | 5955 / 59 — Oscillators and Piezoelectric Crystals |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) SINGLE MOUNTING FACILITY |
| Overall Diameter | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Style Designator | CUP |
| Nominal Thread Size | 0.112 INCHES SINGLE MOUNTING FACILITY IN |
| Bolt Circle Diameter | 0.803 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Thread Class | 2B SINGLE MOUNTING FACILITY |
| Material | COPPER ALLOY |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2620691 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 5955-00-400-8145 is a Holder,crystal Unit, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5955, Oscillators and Piezoelectric Crystals. Status: active.
NSN 5955-00-400-8145 has 1 manufacturer part number on file: 2620691 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 2620691: Mounting Facility Type and Quantity: 4 THREADED HOLE(S) SINGLE MOUNTING FACILITY; Overall Height: 0.334 INCHES NOMINAL IN; Overall Diameter: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN; Style Designator: CUP. 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.
NSN 5955-00-400-8145 has DEMIL Code D. 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.