The Dampener,fluid Pressure, cataloged under National Stock Number 6685-01-138-1672, 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 Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-138-1672 |
| Primary Part Number | GF400S |
| Item Name | Dampener,fluid Pressure |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| Status | ACTIVE |
| Removable Piston | NOT PROVIDED |
| Operating Pressure Range | +0.0 TO 3000.0 POUNDS PER SQUARE INCH LBS |
| Nominal Pipe Size Designation | 0.250 INCHES IN |
| Thread Location | EXTERNAL |
| Threaded Direct Pressure Connection | PROVIDED |
| Thread Size | 1/4-18 |
| Screw Thread Series Designator | NPTF |
| Material | STEEL |
| Connection Quantity | 2 |
| 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 |
|---|---|
| GF400S PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| Reference | Meaning |
|---|---|
| GF400S | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| GF400S | 5/9 Secondary reference Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn |
| E120SA49108 FIND NO 16 | 5/9 Secondary reference Bird-Johnson Propeller Company, Llc |
NSN 6685-01-138-1672 is a Dampener,fluid Pressure, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-138-1672 has 1 manufacturer part number on file: GF400S (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division).
Key specifications for GF400S: Removable Piston: NOT PROVIDED; Operating Pressure Range: +0.0 TO 3000.0 POUNDS PER SQUARE INCH LBS; Nominal Pipe Size Designation: 0.250 INCHES IN; Overall Length: 1.780 INCHES NOMINAL IN. 9 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.