The Retainer,disk,valve, cataloged under National Stock Number 4820-01-516-7003, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Naval Inventory Control Point Mechanicsburg (CAGE 03950) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-516-7003 |
| Primary Part Number | B3428-.75CP |
| Item Name | Retainer,disk,valve |
| 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 |
|---|---|
| B3428-.75CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| D1234SW ITEM 11 | 5/9 Secondary reference Danco Valve Company |
| B3428-.75CP | 3/9 Design control — primary reference Danco Valve Company |
| D1234SW ITEM 11 | C/1 Advisory reference — outside the item-of-supply concept Dante Valve Company |
| B3428-.75CP | C/1 Advisory reference — outside the item-of-supply concept Dante Valve Company |
| D1234 | D/9 Drawing number reference only Danco Valve Company |
NSN 4820-01-516-7003 is a Retainer,disk,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-516-7003 has 1 manufacturer part number on file: B3428-.75CP (Naval Inventory Control Point Mechanicsburg).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-517-6062, 5331-01-517-6066. Verify interchangeability with system specifications before substitution.
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.