The Indicator,humidity,plug, cataloged under National Stock Number 6685-01-083-6317, 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 Clariant Corp Div Clariant Corporation. Government technical data includes 6 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-083-6317 |
| Primary Part Number | 3428 |
| Item Name | Indicator,humidity,plug |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Clariant Corp Div Clariant Corporation |
| Status | ACTIVE |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Desiccant Spot Humidity Percentage | 20.0 AND 30.0 AND 40.0 |
| End Connection Type | EXTERNAL, SEAT OR GASKET SEAL SINGLE END |
| Style Designator | PLUG |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 2017 AND ALUMINUM ALLOY 2024 |
| 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 |
|---|---|
| 3428 PRIMARY | Clariant Corp Div Clariant Corporation (USA) |
| 563649 | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 3149668 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 3149668 | 7/2 Vendor item drawing reference Naval Sea Systems Command |
| 6685PL1258762 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 563649 | 5/9 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| HUM 18-234P | 5/1 Secondary reference Clariant Corp Div Clariant Corporation |
NSN 6685-01-083-6317 is a Indicator,humidity,plug, manufactured by Clariant Corp Div Clariant Corporation, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-083-6317 has 2 manufacturer part numbers on file: 3428 (Clariant Corp Div Clariant Corporation), 563649 (Lockheed Martin Corporation Div Rms).
6 possible matches (shared part number, not a government interchangeability claim): 5940-01-147-8534, 4820-01-212-6791, 4320-01-248-7924. Verify interchangeability with system specifications before substitution.
Key specifications for 3428: Overall Height: 0.930 INCHES NOMINAL IN; Width Across Flats: 1.000 INCHES NOMINAL IN; Desiccant Spot Humidity Percentage: 20.0 AND 30.0 AND 40.0; End Connection Type: EXTERNAL, SEAT OR GASKET SEAL SINGLE END. 6 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.