The Valve,check, cataloged under National Stock Number 4820-01-539-6665, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is North American Controls Inc Dba North American Controls Inc. Government technical data includes 7 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-539-6665 |
| Primary Part Number | 11306 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | North American Controls Inc Dba North American Controls Inc |
| Status | ACTIVE |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END |
| Connection Type | THREADED CARTRIDGE FIRST END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.875 INCHES FIRST END IN |
| Thread Class | 2B FIRST END |
| Thread Series Designator | UNF FIRST END |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4820-01-539-6665 is a Valve,check, manufactured by North American Controls Inc Dba North American Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-539-6665 has 2 manufacturer part numbers on file: 11306SP (North American Controls Inc Dba North American Controls Inc), 11306 (North American Controls Inc Dba North American Controls Inc).
1 possible match (shared part number, not a government interchangeability claim): 3455-01-573-8963. Verify interchangeability with system specifications before substitution.
Key specifications for 11306: Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END; Connection Type: THREADED CARTRIDGE FIRST END; Thread Direction: RIGHT-HAND FIRST END; Nominal Thread Size: 0.875 INCHES FIRST END IN. 7 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.