The Diaphragm,valve,flat, cataloged under National Stock Number 4810-01-396-5149, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4810-01-396-5149 |
| Primary Part Number | 803-6397408-PC020 |
| Item Name | Diaphragm,valve,flat |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Outside Diameter | 25.020 INCHES NOMINAL IN |
| Style Designator | FLAT |
| Material Document and Classification | LOCKHEED-CALIFORNIA CO, C-22-1221 MFR REF SINGLE MATERIAL RESPONSE |
| Material Thickness | 0.140 INCHES NOMINAL IN |
| Bolt Hole Quantity | 16 |
| Bolt Circle Diameter | 23.250 INCHES NOMINAL IN |
| Center Hole Diameter | 1.160 INCHES NOMINAL IN |
| Media for Which Designed | WATER |
| Material | PLASTIC POLYAMIDE NYLON AND RUBBER |
| Hole Diameter | 0.820 INCHES NOMINAL IN |
| 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 |
|---|---|
| 803-6397408-PC020 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-6397408 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4810-01-396-5149 is a Diaphragm,valve,flat, manufactured by Naval Sea Systems Command, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-396-5149 has 1 manufacturer part number on file: 803-6397408-PC020 (Naval Sea Systems Command).
Key specifications for 803-6397408-PC020: Outside Diameter: 25.020 INCHES NOMINAL IN; Style Designator: FLAT; Material Document and Classification: LOCKHEED-CALIFORNIA CO, C-22-1221 MFR REF SINGLE MATERIAL RESPONSE; Material Thickness: 0.140 INCHES NOMINAL IN. 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.