The Valve,check, cataloged under National Stock Number 4820-01-421-5241, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-421-5241 |
| Primary Part Number | 12364918 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.620 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Nominal Outside Diameter | 0.880 INCHES ALL ENDS IN |
| Thread Class | 3A ALL ENDS A |
| Material | STEEL BODY |
| Thread Series Designator | UNF 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 |
|---|---|
| CLS-06-27M | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| 12364918 | Bae Systems Land & Armaments L.p. (USA) |
| 12364918 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 12364918 | Amz Alabama Inc. (USA) |
| Reference | Meaning |
|---|---|
| CLS-06-27M | 5/9 Secondary reference Parker Hannifin Corporation Dba Gresen Hydraulics Div Hydraulic Valve Division |
NSN 4820-01-421-5241 is a Valve,check, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-5241 has 4 manufacturer part numbers on file: CLS-06-27M (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division), 12364918 (Bae Systems Land & Armaments L.p.), 12364918 (U S Army Tank Automotive Command Amsta-Im-Mm), 12364918 (Amz Alabama Inc.).
Key specifications for 12364918: Flow Control Device: DISK; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: THREADED EXTERNAL BOSS ALL ENDS. 14 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.