The Thermostat,flow Control, cataloged under National Stock Number 6685-01-498-1900, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-498-1900 |
| Item Name | Thermostat,flow Control |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Spring Operated Pressure Relief | NOT PROVIDED |
| Mounting Method | FLANGE |
| Thermostat Type | TRANSISTORIZED |
| Usage Design | TEMPERATURE CONTROL OF MEDIA |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 300866 | 3/9 Design control — primary reference Tri-Tec Manufacturing, Llc |
| 300866 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6685-01-498-1900 is a Thermostat,flow Control, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6515-01-524-8972, 4710-01-614-3415. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-01-498-1900: Spring Operated Pressure Relief: NOT PROVIDED; Mounting Method: FLANGE; Thermostat Type: TRANSISTORIZED; Part Name Assigned by Controlling Agency: BOX, CONTROL TEMPERATURE. 4 specifications are 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.
NSN 6685-01-498-1900 has DEMIL Code D. 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.