The Filter,signal Light, cataloged under National Stock Number 5850-01-161-0665, is classified within Federal Supply Class 5850 (Visible and Invisible Light Communication Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5850-01-161-0665 |
| Primary Part Number | 637-6520-001 |
| Item Name | Filter,signal Light |
| FSC / FSG | 5850 / 58 — Visible and Invisible Light Communication Equipment |
| Manufacturer | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| Status | ACTIVE |
| FSC Application Data | CONTROL ASSEMBLY,MECHANICAL |
| Mounting Method | SCREW ON |
| Polarization Feature | NOT INCLUDED |
| Supplementary Features | USED ON AN/ARC-186 RADIO SET |
| Overall Thickness | 0.057 INCHES MINIMUM AND 0.067 INCHES MAXIMUM IN |
| Top/bottom Gasket | NOT INCLUDED |
| Color | BLUE |
| Material | PLASTIC |
| 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 |
|---|---|
| 637-6520-001 PRIMARY | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| Reference | Meaning |
|---|---|
| 637-6520 | D/9 Drawing number reference only Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 5850-01-161-0665 is a Filter,signal Light, manufactured by Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems, classified under FSC 5850, Visible and Invisible Light Communication Equipment. Status: active.
NSN 5850-01-161-0665 has 1 manufacturer part number on file: 637-6520-001 (Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems).
2 possible matches (shared part number, not a government interchangeability claim): 5850-01-161-0666, 5850-01-162-5870. Verify interchangeability with system specifications before substitution.
Key specifications for 637-6520-001: FSC Application Data: CONTROL ASSEMBLY,MECHANICAL; Mounting Method: SCREW ON; Polarization Feature: NOT INCLUDED; Supplementary Features: USED ON AN/ARC-186 RADIO SET. 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.