The Seat,valve, cataloged under National Stock Number 4820-00-887-3288, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. 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 | 4820-00-887-3288 |
| Primary Part Number | 555982 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.255 INCHES NOMINAL IN |
| Flange Diameter | 0.367 INCHES NOMINAL IN |
| Body Outside Diameter | 0.210 INCHES NOMINAL IN |
| Body Stepped Inside Diameter | 0.092 INCHES MINIMUM AND 0.097 INCHES MAXIMUM SECOND STEP IN |
| Body Stepped Inside Diameter | 0.125 INCHES NOMINAL FIRST STEP IN |
| Body Stepped Inside Diameter | 0.160 INCHES NOMINAL THIRD STEP IN |
| Style Designator | PLAIN FLANGED |
| Surface Treatment | ANODIZE OVERALL |
| Under Flange Height | 0.135 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 6061 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 |
|---|---|
| 555982 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 4820-00-887-3288 is a Seat,valve, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-887-3288 has 1 manufacturer part number on file: 555982 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
Key specifications for 555982: Flange Seat to Disk End Height: 0.255 INCHES NOMINAL IN; Flange Diameter: 0.367 INCHES NOMINAL IN; Body Outside Diameter: 0.210 INCHES NOMINAL IN; Body Stepped Inside Diameter: 0.092 INCHES MINIMUM AND 0.097 INCHES MAXIMUM SECOND STEP IN. 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.