The Indicator,humidity,plug, cataloged under National Stock Number 6685-01-421-0658, 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 Naval Group Site De Lorient. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-421-0658 |
| Primary Part Number | EA00753 |
| Item Name | Indicator,humidity,plug |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Naval Group Site De Lorient |
| Status | ACTIVE |
| 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 |
|---|---|
| EA00753 | Naval Group Site De Lorient (FRA) |
| Reference | Meaning |
|---|---|
| MI-31A-1-1/8S | 3/9 Design control — primary reference Henry Technologies, Inc. |
NSN 6685-01-421-0658 is a Indicator,humidity,plug, manufactured by Naval Group Site De Lorient, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-421-0658 has 1 manufacturer part number on file: EA00753 (Naval Group Site De Lorient).
Key specifications for EA00753: Special Features: 4-1/8 IN. OVERALL HEIGHT; 1-1/8 CONNECTION SIZE IN. 0 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.
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.