The Mark Filter,keyer, cataloged under National Stock Number 5815-01-148-1769, is classified within Federal Supply Class 5815 (Teletype and Facsimile Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Department of the Army Hq United States Army Communications Research and Development Command. The record lists 2 manufacturer part numbers 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.
| Item Name | Mark Filter,keyer |
| FSC / FSG | 5815 — Teletype and Facsimile Equipment (FSG 58) |
| Manufacturers | Thales Defense & Security Inc Dba Thales Communications Inc (CAGE 23386); Department of the Army Hq United States Army Communications Research and Development Command (CAGE 56996) |
| Parameter | Value |
|---|---|
| NSN | 5815-01-148-1769 |
| Primary Part Number | B4009109 |
| Item Name | Mark Filter,keyer |
| FSC / FSG | 5815 / 58 — Teletype and Facsimile Equipment |
| Manufacturer | Department of the Army Hq United States Army Communications Research and Development Command |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
NSN 5815-01-148-1769 is a Mark Filter,keyer, manufactured by Department of the Army Hq United States Army Communications Research and Development Command, classified under FSC 5815, Teletype and Facsimile Equipment. Status: active.
NSN 5815-01-148-1769 has 2 manufacturer part numbers on file: 09219 (Thales Defense & Security Inc Dba Thales Communications Inc), B4009109 (Department of the Army Hq United States Army Communications Research and Development Command).
1 possible match (shared part number, not a government interchangeability claim): 3230-01-340-2942. Verify interchangeability with system specifications before substitution.
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.