The Attenuator,fixed, cataloged under National Stock Number 5985-00-166-0777, 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 Telephonics Corp/prd Instruments. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 — Antennas, Waveguides, and Related Equipment (FSG 59) |
| Manufacturers | Telephonics Corp/prd Instruments (CAGE 9N770); Alan Industries Inc (CAGE 52750) |
| Parameter | Value |
|---|---|
| NSN | 5985-00-166-0777 |
| Primary Part Number | 1654-3S1 |
| Item Name | Attenuator,fixed |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Telephonics Corp/prd Instruments |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1654-3S1 PRIMARY | Telephonics Corp/prd Instruments (USA) |
| 50MP3-652 | Alan Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 247ASC0179-001 | 7/2 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 1654-3S1 | 5/9 Secondary reference Peraton Inc |
| 4773-3 | 5/9 Secondary reference U.S. Government activity |
| 247ASC0179-001 | 5/9 Secondary reference Advanced Technical Materials, Inc. Dba a T M |
| ZZ-923 | 5/9 Secondary reference Alan Industries Inc |
NSN 5985-00-166-0777 is a Attenuator,fixed, manufactured by Telephonics Corp/prd Instruments, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-166-0777 has 2 manufacturer part numbers on file: 1654-3S1 (Telephonics Corp/prd Instruments), 50MP3-652 (Alan Industries Inc).
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 5985-00-166-0777 has DEMIL Code Q. 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.