The Seat,valve, cataloged under National Stock Number 4820-00-005-7405, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grimes Aerospace Company. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-005-7405 |
| Primary Part Number | 383V316 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.153 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN |
| Flange Diameter | 0.496 INCHES MINIMUM AND 0.498 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.384 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.125 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Under Flange Height | 0.405 INCHES MINIMUM AND 0.407 INCHES MAXIMUM IN |
| Material | STEEL CORROSION RESISTING OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 383V316 PRIMARY | Grimes Aerospace Company (USA) |
| Reference | Meaning |
|---|---|
| 383V316 | 5/9 Secondary reference Grimes Aerospace Co |
NSN 4820-00-005-7405 is a Seat,valve, manufactured by Grimes Aerospace Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-005-7405 has 1 manufacturer part number on file: 383V316 (Grimes Aerospace Company).
Key specifications for 383V316: Flange Seat to Disk End Height: 0.153 INCHES MINIMUM AND 0.159 INCHES MAXIMUM IN; Flange Diameter: 0.496 INCHES MINIMUM AND 0.498 INCHES MAXIMUM IN; Body Outside Diameter: 0.384 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL. 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.