The Seat,valve, cataloged under National Stock Number 4820-00-012-3260, 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 11 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-012-3260 |
| Primary Part Number | 45D63 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grimes Aerospace Company |
| Status | ACTIVE |
| Thread Length | 0.380 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Seal Accommodation Type | GROOVED |
| Style Designator | PLAIN THREADED |
| Material Document and Classification | AMS5640 ASSN STD 1ST MATERIAL RESPONSE OR QQ-S-763 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.155 INCHES MINIMUM AND 0.157 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.438 INCHES SINGLE THREADED PORTION IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A SINGLE THREADED PORTION A |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNF SINGLE THREADED PORTION |
| 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 |
|---|---|
| 45D63 PRIMARY | Grimes Aerospace Company (USA) |
NSN 4820-00-012-3260 is a Seat,valve, manufactured by Grimes Aerospace Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-012-3260 has 1 manufacturer part number on file: 45D63 (Grimes Aerospace Company).
Key specifications for 45D63: Overall Height: 0.785 INCHES MINIMUM AND 0.795 INCHES MAXIMUM IN; Thread Length: 0.380 INCHES NOMINAL SINGLE THREADED PORTION IN; Seal Accommodation Type: GROOVED; Style Designator: PLAIN THREADED. 11 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.