The Seat,valve, cataloged under National Stock Number 4810-01-054-8523, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4810-01-054-8523 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN |
| Flange Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Hardness Rating | 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | QQ-S-763 FED STD ALL MATERIAL RESPONSES OVERALL |
| Body Inside Diameter | 0.0475 INCHES MINIMUM AND 0.0485 INCHES MAXIMUM IN |
| Seat Radius | 0.035 INCHES NOMINAL IN |
| Under Flange Height | 0.1795 INCHES MINIMUM AND 0.1805 INCHES MAXIMUM IN |
| Material | STEEL COMP 440C OVERALL |
| Seating Surface Shape | RADIAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 35459 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4810-01-054-8523 is a Seat,valve, classified under FSC 4810, Valves, Powered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2990-01-178-3029. Verify interchangeability with system specifications before substitution.
Key specifications for 4810-01-054-8523: Flange Seat to Disk End Height: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN; Flange Diameter: 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN; Body Outside Diameter: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN; Hardness Rating: 55.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM OVERALL. 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.