The Valve,check, cataloged under National Stock Number 4820-01-331-3554, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grainger W W Inc Grainger Div. Government technical data includes 9 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-331-3554 |
| Primary Part Number | WN CHK 695-4B4B-B |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grainger W W Inc Grainger Div |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | HOSE SOCKET (HOSE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | UNTHREADED INTERNAL HOSE ALL ENDS |
| Style Designator | OFFSET |
| Offset Distance | 0.300 INCHES IN |
| Disk Loading Method | SPRING |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| 4DHY9 | Grainger W W Inc Grainger Div (USA) |
| WN CHK 695-4B4B-B PRIMARY | Grainger W W Inc Grainger Div (USA) |
| 1771AS819-1 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| C60Z-19A563A | 5/9 Secondary reference Ford Motor Co Ford Div Govt 8 Fleet Parts Sales |
| 85590-42 | 5/9 Secondary reference American Wiper Motor Corp |
| YG-34 | 5/9 Secondary reference Sps Technologies, Llc Dba Airdrome Precision Components |
| 85590-42 | 5/9 Secondary reference Trico Products Corporation |
| 1771AS819 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| WWP8101 | 5/9 Secondary reference Standard Motor Products |
NSN 4820-01-331-3554 is a Valve,check, manufactured by Grainger W W Inc Grainger Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-331-3554 has 3 manufacturer part numbers on file: 4DHY9 (Grainger W W Inc Grainger Div), WN CHK 695-4B4B-B (Grainger W W Inc Grainger Div), 1771AS819-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for WN CHK 695-4B4B-B: Flow Control Device: DISK; Connection Style: HOSE SOCKET (HOSE) ALL ENDS; Mounting Position: HORIZONTAL; Connection Type: UNTHREADED INTERNAL HOSE ALL ENDS. 9 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.