The Retainer,seat,valve, cataloged under National Stock Number 4820-01-731-9882, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Timken Gears & Services Inc. Div Philadelphia Gear. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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,seat,valve |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Timken Gears & Services Inc. Div Philadelphia Gear (CAGE 17454) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-731-9882 |
| Primary Part Number | 50308-0490 |
| Item Name | Retainer,seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Timken Gears & Services Inc. Div Philadelphia Gear |
| 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 |
|---|---|
| 50308-0490 PRIMARY | Timken Gears & Services Inc. Div Philadelphia Gear (USA) |
| Reference | Meaning |
|---|---|
| 14070-0056 ITEM 8 | C/1 Advisory reference — outside the item-of-supply concept Timken Gears & Services Inc. Div Philadelphia Gear |
| 14070-0056 | D/9 Drawing number reference only Timken Gears & Services Inc. Div Philadelphia Gear |
NSN 4820-01-731-9882 is a Retainer,seat,valve, manufactured by Timken Gears & Services Inc. Div Philadelphia Gear, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-731-9882 has 1 manufacturer part number on file: 50308-0490 (Timken Gears & Services Inc. Div Philadelphia Gear).
2 possible matches (shared part number, not a government interchangeability claim): 3020-01-732-4201, 3020-01-732-5592. 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.