The Isolator,radio Frequency Reflect, cataloged under National Stock Number 5985-00-682-9145, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) 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 9 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 | 5985-00-682-9145 |
| Primary Part Number | 1857659 |
| Item Name | Isolator,radio Frequency Reflect |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| FSC Application Data | RADAR2GUIDED2MISSILE8CONTROL4SYSTEM8AN/SPG-55 |
| Flange Quantity | 2 |
| Overall Diameter | 4.250 INCHES NOMINAL IN |
| Flange Type | CHOKE |
| Diameter | 3.625 INCHES NOMINAL IN |
| Flange Connecting Hole Diameter | 0.217 INCHES MINIMUM AND 0.225 INCHES MAXIMUM IN |
| Frequency Range Rating | +5400.0 TO 5900.0 MEGAHERTZ |
| Flange Connecting Hole Spacing | EQUALLY SPACED ON 3-1/4 BOLT CIRCLE |
| Flange Connection Facility Quantity | 8 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1857659 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 5985-00-682-9145 is a Isolator,radio Frequency Reflect, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-682-9145 has 1 manufacturer part number on file: 1857659 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 5841-01-092-5170. Verify interchangeability with system specifications before substitution.
Key specifications for 1857659: FSC Application Data: RADAR2GUIDED2MISSILE8CONTROL4SYSTEM8AN/SPG-55; Flange Quantity: 2; Overall Diameter: 4.250 INCHES NOMINAL IN; Flange Type: CHOKE. 9 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5985-00-682-9145 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.