The Valve,check, cataloged under National Stock Number 4820-01-077-1188, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Am General Llc. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-077-1188 |
| Primary Part Number | 5963978 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Am General Llc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Style Designator | TEE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.375 INCHES ALL ENDS IN |
| Material | STEEL 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 |
|---|---|
| 5963978 PRIMARY | Am General Llc (USA) |
| 278595 PIECE 280809 | Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems (USA) |
| SF-5963978 | Am General Llc (USA) |
| Reference | Meaning |
|---|---|
| 278595 | D/9 Drawing number reference only Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems |
NSN 4820-01-077-1188 is a Valve,check, manufactured by Am General Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-077-1188 has 3 manufacturer part numbers on file: 5963978 (Am General Llc), 278595 PIECE 280809 (Bendix Commercial Vehicle Systems Llc Dba Bendix Commercial Vehicle Systems), SF-5963978 (Am General Llc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-082-3077, 4820-01-147-4995. Verify interchangeability with system specifications before substitution.
Key specifications for 5963978: Flow Control Device: POPPET; Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 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.