The Attenuator,variable, cataloged under National Stock Number 5985-00-309-5539, 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 Shallco, Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5985-00-309-5539 |
| Primary Part Number | P620 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Shallco, Inc |
| Status | ACTIVE |
| Application Design | AUDIO |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| P620 PRIMARY | Shallco, Inc (USA) |
| P620 | Meggitt (new Hampshire), Inc (USA) |
| Reference | Meaning |
|---|---|
| KS9457-3DWGESL660125 | 5/9 Secondary reference American Telephone and Telegraph Co |
| WE141-4 | 5/9 Secondary reference Shallco, Inc |
| KS9457-3DWGESL660125 | 5/9 Secondary reference At and T Corp |
| ES800474-6-165000 | 5/9 Secondary reference American Telephone and Telegraph Co |
| ES800474-6-165000 | 5/9 Secondary reference At and T Corp |
NSN 5985-00-309-5539 is a Attenuator,variable, manufactured by Shallco, Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-309-5539 has 2 manufacturer part numbers on file: P620 (Shallco, Inc), P620 (Meggitt (new Hampshire), Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5360-01-341-5385, 5998-01-677-8283, 5998-01-708-0428. Verify interchangeability with system specifications before substitution.
Key specifications for P620: Application Design: AUDIO. 1 specification is 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.
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.