FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
FSG: 66 — Instruments and Laboratory Equipment
General Description
The Rotor,psychrometer, cataloged under National Stock Number 6685-01-271-1956, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6685-01-271-1956
Item Name
Rotor,psychrometer
FSC / FSG
6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Status
ACTIVE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code
X
⇄Related Items4
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5120-01-304-3632101680POSSIBLE MATCH
ADJUSTING TOOL,SECO
Possible match (shared part number)Aqualung Usa, Inc
6750-01-390-0441POSSIBLE MATCH
FILM,PHOTOGRAPHIC
Possible match (shared part number)
5340-01-670-3052101680POSSIBLE MATCH
PLATE,MOUNTING
Possible match (shared part number)Naval Surface Warfare Center Dahlgren Div
6030-01-690-7617101680POSSIBLE MATCH
MULTIPLEXER,LIGHT SIGNAL
Possible match (shared part number)L3 Technologies, Inc. Div L3 Keo
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
500990
5/9Secondary reference
Climatronics Corp.
101680
3/9Design control — primary reference
Climatronics Corp.
Related Parts
5120-01-304-3632POSSIBLE MATCH
ADJUSTING TOOL,SECO
101680
6750-01-390-0441POSSIBLE MATCH
FILM,PHOTOGRAPHIC
5340-01-670-3052POSSIBLE MATCH
PLATE,MOUNTING
101680
6030-01-690-7617POSSIBLE MATCH
MULTIPLEXER,LIGHT SIGNAL
101680
Frequently Asked Questions
What is NSN 6685-01-271-1956?
NSN 6685-01-271-1956 is a Rotor,psychrometer, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
What NSN replaces 6685-01-271-1956?
4 possible matches (shared part number, not a government interchangeability claim): 5120-01-304-3632, 6750-01-390-0441, 5340-01-670-3052. Verify interchangeability with system specifications before substitution.
What are the specifications of 6685-01-271-1956?
Key specifications for 6685-01-271-1956: Overall Height: 3.281 INCHES NOMINAL IN. 0 specifications are documented in the U.S. Government catalog.
Is NSN 6685-01-271-1956 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.