The Valve,vent, cataloged under National Stock Number 4820-01-413-3203, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Robert H Wager Co Inc. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-413-3203 |
| Primary Part Number | 3-1660WSG |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Robert H Wager Co Inc |
| Status | ACTIVE |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Connection Type | BUTT WELD TUBE ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 3.000 INCHES ALL ENDS IN |
| Surface Treatment | ZINC |
| Material | STEEL BODY |
| 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 |
|---|---|
| 3-1660WSG PRIMARY | Robert H Wager Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 1660W 3IN STL | C/1 Advisory reference — outside the item-of-supply concept Robert H Wager Co Inc |
| 1660W 3IN | C/1 Advisory reference — outside the item-of-supply concept Robert H Wager Co Inc |
NSN 4820-01-413-3203 is a Valve,vent, manufactured by Robert H Wager Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-413-3203 has 1 manufacturer part number on file: 3-1660WSG (Robert H Wager Co Inc).
Key specifications for 3-1660WSG: Connection Style: PLAIN (TUBE) ALL ENDS; Connection Type: BUTT WELD TUBE ALL ENDS; Nominal Outside Diameter Tube Accommodated: 3.000 INCHES ALL ENDS IN; Special Features: 500 AUXILARY. 5 specifications are documented in the U.S. Government catalog.
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.