The Seat,valve, cataloged under National Stock Number 4820-01-123-2187, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leroi International Inc Dba Compair Leroi. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-123-2187 |
| Primary Part Number | 45016 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leroi International Inc Dba Compair Leroi |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.124 INCHES NOMINAL IN |
| Flange Diameter | 0.750 INCHES NOMINAL IN |
| Body Outside Diameter | 0.565 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.375 INCHES NOMINAL IN |
| Seat Radius | 0.250 INCHES NOMINAL IN |
| Under Flange Height | 0.222 INCHES NOMINAL IN |
| Material | STEEL 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 |
| Part Number | Manufacturer |
|---|---|
| 45016 PRIMARY | Leroi International Inc Dba Compair Leroi (USA) |
| Reference | Meaning |
|---|---|
| 45016 | 5/9 Secondary reference Compair Kellogg Div of Robertshaw Controls Co |
NSN 4820-01-123-2187 is a Seat,valve, manufactured by Leroi International Inc Dba Compair Leroi, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-123-2187 has 1 manufacturer part number on file: 45016 (Leroi International Inc Dba Compair Leroi).
2 possible matches (shared part number, not a government interchangeability claim): 6665-01-444-5636, 7510-01-476-8923. Verify interchangeability with system specifications before substitution.
Key specifications for 45016: Flange Seat to Disk End Height: 0.124 INCHES NOMINAL IN; Flange Diameter: 0.750 INCHES NOMINAL IN; Body Outside Diameter: 0.565 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 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.