The Plunger,control Sta, cataloged under National Stock Number 6685-00-786-2121, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Plunger,control Sta |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives (CAGE 41387); Siemens Moore Process Automation (CAGE U2445) |
| Parameter | Value |
|---|---|
| NSN | 6685-00-786-2121 |
| Primary Part Number | 6750-21 |
| Item Name | Plunger,control Sta |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
NSN 6685-00-786-2121 is a Plunger,control Sta, manufactured by Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-00-786-2121 has 2 manufacturer part numbers on file: 6750-21 (Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives), 6750-21 (Siemens Moore Process Automation).
2 possible matches (shared part number, not a government interchangeability claim): 4820-00-929-5875, 5998-01-334-9368. Verify interchangeability with system specifications before substitution.
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.