The Seat,valve, cataloged under National Stock Number 4820-00-015-3245, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-015-3245 |
| Primary Part Number | 5A16 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.095 INCHES NOMINAL IN |
| Body Outside Diameter | 0.688 INCHES NOMINAL IN |
| Thread Length | 0.188 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.419 INCHES MINIMUM AND 0.423 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.562 INCHES SINGLE THREADED PORTION IN |
| Seat Radius | 0.031 INCHES NOMINAL IN |
| Under Flange Height | 0.188 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Material | STEEL BODY |
| Material | STEEL FACE |
| Thread Series Designator | UNEF SINGLE THREADED PORTION |
| 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 |
NSN 4820-00-015-3245 is a Seat,valve, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-015-3245 has 2 manufacturer part numbers on file: 5A16 (Watts Regulator Company), 135B16 (Watts Regulator Company).
Key specifications for 5A16: Flange Seat to Disk End Height: 0.095 INCHES NOMINAL IN; Body Outside Diameter: 0.688 INCHES NOMINAL IN; Thread Length: 0.188 INCHES NOMINAL SINGLE THREADED PORTION IN; Style Designator: PLAIN FLANGED. 13 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.