The Valve,check, cataloged under National Stock Number 4820-01-440-7579, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Howell Laboratories Inc Dba Howell Laboratories Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-440-7579 |
| Primary Part Number | 6695 ITEM 2 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 6695 ITEM 2 PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 6730-G502 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 6730B-G502 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| 6694 ITEM 2 | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| 6695 | D/9 Drawing number reference only Howell Laboratories Inc Dba Howell Laboratories Inc |
NSN 4820-01-440-7579 is a Valve,check, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-440-7579 has 4 manufacturer part numbers on file: 6695 ITEM 2 (Howell Laboratories Inc Dba Howell Laboratories Inc), 6730-G502 (Howell Laboratories Inc Dba Howell Laboratories Inc), 6730B-G502 (Howell Laboratories Inc Dba Howell Laboratories Inc), 6694 ITEM 2 (Howell Laboratories Inc Dba Howell Laboratories Inc).
Key specifications for 6695 ITEM 2: End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 0 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.