The Switch,liquid Level, cataloged under National Stock Number 6680-01-420-9249, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Clark-Reliance Llc. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-420-9249 |
| Primary Part Number | JMS-1053 |
| Item Name | Switch,liquid Level |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Clark-Reliance Llc |
| Status | ACTIVE |
| Actuation Method | BUOYANCY |
| Mounting Position | HORIZONTAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 6680-01-420-9249 is a Switch,liquid Level, manufactured by Clark-Reliance Llc, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-420-9249 has 2 manufacturer part numbers on file: JMS-1053 (Clark-Reliance Llc), F83 (Emerson Process Management Gmbh & Co. Ohg).
1 possible match (shared part number, not a government interchangeability claim): 6605-01-497-2311. Verify interchangeability with system specifications before substitution.
Key specifications for JMS-1053: Actuation Method: BUOYANCY; Mounting Position: HORIZONTAL; Special Features: STAINLESS STEEL;FLOATS UNITS ARE OF INTEGRAL CONSTRUCTION AND MUST BE REPLACED BY COMPLETE UNITS.; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 2 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.