The Seat,valve, cataloged under National Stock Number 4820-00-005-7397, 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 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-005-7397 |
| Primary Part Number | 383V305 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Flange Diameter | 1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN |
| Body Outside Diameter | 1.184 INCHES MINIMUM AND 1.870 INCHES MAXIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL |
| Body Inside Diameter | 0.875 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Seat Angle in Deg | 0.750 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 383V305 PRIMARY | Grimes Aerospace Company (USA) |
| Reference | Meaning |
|---|---|
| 383V305 | 5/9 Secondary reference Grimes Aerospace Co |
NSN 4820-00-005-7397 is a Seat,valve, manufactured by Grimes Aerospace Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-005-7397 has 1 manufacturer part number on file: 383V305 (Grimes Aerospace Company).
Key specifications for 383V305: Flange Diameter: 1.360 INCHES MINIMUM AND 1.380 INCHES MAXIMUM IN; Overall Height: 2.307 INCHES MINIMUM AND 2.317 INCHES MAXIMUM IN; Body Outside Diameter: 1.184 INCHES MINIMUM AND 1.870 INCHES MAXIMUM IN; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM OVERALL. 8 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.