The Chamber,piston, cataloged under National Stock Number 4820-00-391-8178, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 34 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Chamber,piston |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Hunt Valve Company, Inc. (CAGE 11859) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-391-8178 |
| Primary Part Number | AA20045PC20042-9 |
| Item Name | Chamber,piston |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AA20045PC20042-9 PRIMARY | Hunt Valve Company, Inc. (USA) |
| AA20042PC20042-9 PRIMARY | Hunt Valve Company, Inc. (USA) |
| AA21257PC21257-9 PRIMARY | Hunt Valve Company, Inc. (USA) |
| 9188-10-1 PRIMARY | Hunt Valve Company, Inc. (USA) |
| D15493MD PRIMARY | Hunt Valve Company, Inc. (USA) |
| AA21044PC21044-9 PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| AA20042PC20042-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA23019PC23018-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA23018PC23018-9 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| 9188-10-1 | 5/9 Secondary reference Hammel Dahl Inc |
| AA21256PC21257-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA17494PC17494-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA22783PC22783-9 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| AA17493PC17494-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA23018PC23018-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA21044PC21044-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA22783PC22783-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA21043-1PC21044-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA17493PC17494-9 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| AA21256PC21257-9 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| AA21043-1PC21044-9 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| D15493MD | 5/9 Secondary reference Hammel Dahl Inc |
| AA21044-1PC21044-9 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| D15493MD | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
| AA22781PC22783-9 | 5/9 Secondary reference Hammel Dahl Inc |
| AA6965PC6965-9 | 5/9 Secondary reference Hunt Valve Company Inc Dba Union Flonetics |
NSN 4820-00-391-8178 is a Chamber,piston, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-391-8178 has 6 manufacturer part numbers on file: AA20045PC20042-9 (Hunt Valve Company, Inc.), AA20042PC20042-9 (Hunt Valve Company, Inc.), AA21257PC21257-9 (Hunt Valve Company, Inc.), 9188-10-1 (Hunt Valve Company, Inc.), D15493MD (Hunt Valve Company, Inc.) and 1 more.
No hazard code in the DLA record (HMIC N). 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.