The Valve,stop-Check,ai, cataloged under National Stock Number 4920-01-475-3043, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Watts Regulator Company. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Valve,stop-Check,ai |
| FSC / FSG | 4920 — Aircraft Maintenance and Repair Shop Specialized Equipment (FSG 49) |
| Manufacturers | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (CAGE 30003); Watts Regulator Company (CAGE 79227) |
| Parameter | Value |
|---|---|
| NSN | 4920-01-475-3043 |
| Primary Part Number | B6800-3/8 |
| Item Name | Valve,stop-Check,ai |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 1415AS175 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| B6800-3/8 PRIMARY | Watts Regulator Company (USA) |
| Reference | Meaning |
|---|---|
| VMH2A9-3/8 | 5/9 Secondary reference Dynaquip Controls Corporation |
| 1415AS175 | 7/2 Vendor item drawing reference Copp Industrial Manufacturing, Inc. Dba Copp Industrial Manufacturing |
NSN 4920-01-475-3043 is a Valve,stop-Check,ai, manufactured by Watts Regulator Company, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-475-3043 has 2 manufacturer part numbers on file: 1415AS175 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), B6800-3/8 (Watts Regulator Company).
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.