The Valve,check, cataloged under National Stock Number 4820-01-182-4142, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Coronado Manufacturing, Inc.. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4820-01-182-4142 |
| Primary Part Number | 387-3944 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Coronado Manufacturing, Inc. |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 3 MIL SPEC SINGLE TREATMENT RESPONSE |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 7075 OVERALL |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 387-3944 PRIMARY | Coronado Manufacturing, Inc. (USA) |
| 387-3944 PRIMARY | Tempco Engineering Inc Dba Lmi Aerospace (USA) |
| 387-3944 | Northrop Grumman Systems Corp Div Weapon System (USA) |
| Reference | Meaning |
|---|---|
| 387-3944 | 5/9 Secondary reference Alliant Techsystems Operations Llc |
| 387-3944 | 5/9 Secondary reference Mcdonnell Douglas Helicopter Co Inc |
NSN 4820-01-182-4142 is a Valve,check, manufactured by Coronado Manufacturing, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-182-4142 has 3 manufacturer part numbers on file: 387-3944 (Coronado Manufacturing, Inc.), 387-3944 (Tempco Engineering Inc Dba Lmi Aerospace), 387-3944 (Northrop Grumman Systems Corp Div Weapon System).
Key specifications for 387-3944: Surface Treatment Document and Classification: MIL-A-8625,TYPE 3 MIL SPEC SINGLE TREATMENT RESPONSE; Mounting Position: HORIZONTAL OR VERTICAL; Style Designator: STRAIGHT THRU; Material Document and Classification: QQ-A-225/9 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.
NSN 4820-01-182-4142 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.