The Ring,valve Piston, cataloged under National Stock Number 4820-01-671-6236, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Ring,valve Piston |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Naval Inventory Control Point Mechanicsburg (CAGE 03950) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-671-6236 |
| Primary Part Number | 2640-802X3 ITEM 16D7 |
| Item Name | Ring,valve Piston |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 2640-802X3 ITEM 16D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2640-802X03 ITEM 16D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| 845-7284928 ITEM 11D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7383858-264382086-11D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7550479-264382086-11D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2643-820-86 ITEM 11D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2643-820-86 ITEM 10D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7286252, ITEM 16D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| H547-0001-264382086-11D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| G547-0003-264382086-11D7 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 7383858-264382086-11 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 7286252, ITEM 16 | 5/1 Secondary reference Naval Sea Systems Command |
| H547-0001-264382086-11 | 5/2 Secondary reference U.S. Government activity |
| 2640-802X3 ITEM 16 | 5/2 Secondary reference U.S. Government activity |
| 2643-820-86 ITEM 11 | 5/2 Secondary reference U.S. Government activity |
| G547-0003-264382086-11 | 5/2 Secondary reference U.S. Government activity |
| 2640-802X03 ITEM 16 | 5/1 Secondary reference U.S. Government activity |
| 7550479-264382086-11 | 5/2 Secondary reference U.S. Government activity |
| 845-7284928 ITEM 11 | 5/1 Secondary reference Naval Sea Systems Command |
| 7550479-264382086-11 | 5/1 Secondary reference Naval Sea Systems Command |
| 2643-820-86 ITEM 10 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-671-6236 is a Ring,valve Piston, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-671-6236 has 10 manufacturer part numbers on file: 2640-802X3 ITEM 16D7 (Naval Inventory Control Point Mechanicsburg), 2640-802X03 ITEM 16D7 (Naval Inventory Control Point Mechanicsburg), 845-7284928 ITEM 11D7 (Naval Inventory Control Point Mechanicsburg), 7383858-264382086-11D7 (Naval Inventory Control Point Mechanicsburg), 7550479-264382086-11D7 (Naval Inventory Control Point Mechanicsburg) and 5 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.