The Diaphragm,valve,flat, cataloged under National Stock Number 4820-00-923-4569, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Lawler Manufacturing Company, Inc.. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Lawler Manufacturing Company, Inc. (CAGE 75545) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-923-4569 |
| Primary Part Number | 1890 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Lawler Manufacturing Company, 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 |
|---|---|
| 1008DPC17 | Lawler Manufacturing Company, Inc. (USA) |
| 1890 PRIMARY | Lawler Manufacturing Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 1009DPC17 | 5/9 Secondary reference Lawler Manufacturing Company, Inc. |
| 1008D | D/9 Drawing number reference only Lawler Manufacturing Company, Inc. |
NSN 4820-00-923-4569 is a Diaphragm,valve,flat, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-923-4569 has 2 manufacturer part numbers on file: 1008DPC17 (Lawler Manufacturing Company, Inc.), 1890 (Lawler Manufacturing Company, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 4330-01-012-3313, 6515-01-120-2645, 6750-01-379-7417. Verify interchangeability with system specifications before substitution.
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.