The Seat,valve, cataloged under National Stock Number 4820-01-116-1293, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-116-1293 |
| Primary Part Number | 311903-27 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.175 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Flange Diameter | 0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| FSC Application Data | ENVIRONMENTAL CONTROL SYSTEM |
| Body Outside Diameter | 0.264 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | MIL-S-7720 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.114 INCHES MINIMUM AND 0.118 INCHES MAXIMUM IN |
| Under Flange Height | 0.114 INCHES MINIMUM AND 0.123 INCHES MAXIMUM IN |
| Material | STEEL COMP 302 OVERALL |
| Seating Surface Shape | FLAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 311903-27 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| Reference | Meaning |
|---|---|
| 10124536 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 311903-27 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-116-1293 is a Seat,valve, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-116-1293 has 1 manufacturer part number on file: 311903-27 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
Key specifications for 311903-27: Flange Seat to Disk End Height: 0.175 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN; Flange Diameter: 0.374 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; FSC Application Data: ENVIRONMENTAL CONTROL SYSTEM; Body Outside Diameter: 0.264 INCHES MINIMUM AND 0.269 INCHES MAXIMUM IN. 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.
NSN 4820-01-116-1293 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.