The Seat,valve, cataloged under National Stock Number 4810-01-055-1518, is classified within Federal Supply Class 4810 (Valves, Powered) of the Valves group. The manufacturer of record is Honeywell International Inc. Div Aerospace - Torrance. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4810-01-055-1518 |
| Primary Part Number | 585274-1 |
| Item Name | Seat,valve |
| FSC / FSG | 4810 / 48 — Valves, Powered |
| Manufacturer | Honeywell International Inc. Div Aerospace - Torrance |
| Status | ACTIVE |
| FSC Application Data | RELIEF VALVE |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Body Outside Diameter | 0.584 INCHES MINIMUM AND 0.586 INCHES MAXIMUM IN |
| Style Designator | PLAIN |
| Material Document and Classification | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.5310 INCHES MINIMUM AND 0.5325 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Material | STEEL COMP 17-4PH 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 |
|---|---|
| 585274-1 PRIMARY | Honeywell International Inc. Div Aerospace - Torrance (USA) |
| Reference | Meaning |
|---|---|
| 42631A | 5/9 Secondary reference Itt Aerospace Controls Llc Dba Itt Aerospace Controls Unit S |
NSN 4810-01-055-1518 is a Seat,valve, manufactured by Honeywell International Inc. Div Aerospace - Torrance, classified under FSC 4810, Valves, Powered. Status: active.
NSN 4810-01-055-1518 has 1 manufacturer part number on file: 585274-1 (Honeywell International Inc. Div Aerospace - Torrance).
Key specifications for 585274-1: Overall Height: 0.890 INCHES MINIMUM AND 0.900 INCHES MAXIMUM IN; FSC Application Data: RELIEF VALVE; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Body Outside Diameter: 0.584 INCHES MINIMUM AND 0.586 INCHES MAXIMUM IN. 9 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.