The Valve,check, cataloged under National Stock Number 4820-01-215-7937, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Flairline Fluid/airproducts Div of Ace Controls. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-215-7937 |
| Primary Part Number | CV-1/8 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Flairline Fluid/airproducts Div of Ace Controls |
| Status | ACTIVE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.125 INCHES ALL ENDS IN |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 2011 BODY |
| Thread Series Designator | NPT ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 66148CV-1/8 | Ministry of Defence, De&s Air Defence Electronic Warfare Systems (adews Dt) (GBR) |
| CV-1/8 PRIMARY | Flairline Fluid/airproducts Div of Ace Controls (USA) |
| Reference | Meaning |
|---|---|
| 1805728-1 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation |
NSN 4820-01-215-7937 is a Valve,check, manufactured by Flairline Fluid/airproducts Div of Ace Controls, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-215-7937 has 2 manufacturer part numbers on file: 66148CV-1/8 (Ministry of Defence, De&s Air Defence Electronic Warfare Systems (adews Dt)), CV-1/8 (Flairline Fluid/airproducts Div of Ace Controls).
Key specifications for CV-1/8: Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Style Designator: STRAIGHT THRU. 10 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.