The Valve,vent, cataloged under National Stock Number 4820-01-412-6801, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-412-6801 |
| Primary Part Number | 1660W 1-1/2IN |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Robert H Wager Co Inc |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 1.500 INCHES ALL ENDS IN |
| Connection Style | BEVELED (PIPE) ALL ENDS |
| Connection Type | BUTT WELD PIPE ALL ENDS |
| Media for Which Designed | ALCOHOL, ETHYL SINGLE RESPONSE |
| 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 |
|---|---|
| 1660W 1-1/2IN PRIMARY | Robert H Wager Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 1660W 1-1/2IN S | C/1 Advisory reference — outside the item-of-supply concept Robert H Wager Co Inc |
NSN 4820-01-412-6801 is a Valve,vent, manufactured by Robert H Wager Co Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-412-6801 has 1 manufacturer part number on file: 1660W 1-1/2IN (Robert H Wager Co Inc).
Key specifications for 1660W 1-1/2IN: Nominal Pipe Size Accommodated: 1.500 INCHES ALL ENDS IN; Connection Style: BEVELED (PIPE) ALL ENDS; Connection Type: BUTT WELD PIPE ALL ENDS; Special Features: INCL MESH FLAME SCREEN 1, MESH PROTECTING SCREEN 1, SPACER RING 1, CAP 1, CAPSCREW 3. 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.