Operating Pressure Range: +0.0 TO 10000.0 POUNDS PER SQUARE INCH LBS
Nominal Pipe Size Designation: 0.250 INCHES IN
Thread Location: EXTERNAL AND INTERNAL
Threaded Direct Pressure Connection: PROVIDED
Thread Size: 1/4-18
Screw Thread Series Designator: NPT
Identification
NSN: 6685-01-166-9406
NIIN: 011669406
FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
FSG: 66 — Instruments and Laboratory Equipment
General Description
The Dampener,fluid Pressure, cataloged under National Stock Number 6685-01-166-9406, 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 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6685-01-166-9406
Item Name
Dampener,fluid Pressure
FSC / FSG
6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Status
ACTIVE
Removable Piston
NOT PROVIDED
Operating Pressure Range
+0.0 TO 10000.0 POUNDS PER SQUARE INCH LBS
Nominal Pipe Size Designation
0.250 INCHES IN
Thread Location
EXTERNAL AND INTERNAL
Threaded Direct Pressure Connection
PROVIDED
Thread Size
1/4-18
Screw Thread Series Designator
NPT
Thread Class
2A AND 2B A
Material
COPPER ALLOY
Connection Quantity
2
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
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
J82-04-70404
3/9Design control — primary reference
Altra Industrial Motion Corp.
No interchangeability data on file.
Other items in FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6685-00-001-1475
6685-00-001-1475 · Item name not on file
6685-00-001-1503
CONTROL,TOTALIZER
6685-00-001-1643
6685-00-001-1643 · Item name not on file
6685-00-001-1711
GAGE,PRESSURE,DIAL INDICATING
6685-00-001-2099
6685-00-001-2099 · Item name not on file
6685-00-001-2100
6685-00-001-2100 · Item name not on file
6685-00-001-2101
6685-00-001-2101 · Item name not on file
6685-00-001-2102
6685-00-001-2102 · Item name not on file
Frequently Asked Questions
What is NSN 6685-01-166-9406?
NSN 6685-01-166-9406 is a Dampener,fluid Pressure, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
What are the specifications of 6685-01-166-9406?
Key specifications for 6685-01-166-9406: Removable Piston: NOT PROVIDED; Operating Pressure Range: +0.0 TO 10000.0 POUNDS PER SQUARE INCH LBS; Nominal Pipe Size Designation: 0.250 INCHES IN; Overall Length: 1.375 INCHES NOMINAL IN. 10 specifications are documented in the U.S. Government catalog.
Is NSN 6685-01-166-9406 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.