The Valve,safety Relief, cataloged under National Stock Number 4820-01-535-4729, 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 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Naval Inventory Control Point Mechanicsburg (CAGE 03950) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-535-4729 |
| Primary Part Number | S1E10174 ITEM 009C1 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| S1E10174 ITEM 009C1 | Naval Inventory Control Point Mechanicsburg (USA) |
| S1E10171-9C1 | Naval Inventory Control Point Mechanicsburg (USA) |
| V3C10333-01C1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| S1E10174 ITEM 009 | 3/1 Design control — primary reference U.S. Government activity |
| V3C10333-01 | 5/1 Secondary reference U.S. Government activity |
| S1E10171-9 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-535-4729 is a Valve,safety Relief, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-535-4729 has 3 manufacturer part numbers on file: S1E10174 ITEM 009C1 (Naval Inventory Control Point Mechanicsburg), S1E10171-9C1 (Naval Inventory Control Point Mechanicsburg), V3C10333-01C1 (Naval Inventory Control Point Mechanicsburg).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4820-01-535-4729 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.