The Dampener,fluid Pressure, cataloged under National Stock Number 6685-01-116-9891, 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 Operating & Maintenance Specialties Inc. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Dampener,fluid Pressure |
| FSC / FSG | 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments (FSG 66) |
| Manufacturers | Operating & Maintenance Specialties Inc (CAGE 76906); Bird-Johnson Propeller Company, Llc (CAGE 07309) |
| Parameter | Value |
|---|---|
| NSN | 6685-01-116-9891 |
| Primary Part Number | 055SS-M2940-1HCFG |
| Item Name | Dampener,fluid Pressure |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Operating & Maintenance Specialties Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| 055SS-M2940-1HCFG PRIMARY | Operating & Maintenance Specialties Inc (USA) |
| P-1-5-11 | Bird-Johnson Propeller Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| MOD55TY1CL2COMPC | 5/9 Secondary reference Operating & Maintenance Specialties Inc |
| 115659058PC22 | 5/1 Secondary reference Bird-Johnson Propeller Company, Llc |
| 0555S-M2940-1HCFG | 5/9 Secondary reference Operating & Maintenance Specialties Inc |
NSN 6685-01-116-9891 is a Dampener,fluid Pressure, manufactured by Operating & Maintenance Specialties Inc, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-116-9891 has 2 manufacturer part numbers on file: 055SS-M2940-1HCFG (Operating & Maintenance Specialties Inc), P-1-5-11 (Bird-Johnson Propeller Company, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-226-2357. Verify interchangeability with system specifications before substitution.
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.