The Seat,valve, cataloged under National Stock Number 4820-00-074-1249, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company. Government technical data includes 13 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 | 4820-00-074-1249 |
| Primary Part Number | 2S5123-2 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.443 INCHES NOMINAL IN |
| Flange Diameter | 3.135 INCHES NOMINAL IN |
| Thread Length | 0.342 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Body Stepped Inside Diameter | 1.985 INCHES NOMINAL FIRST STEP IN |
| Body Stepped Inside Diameter | 2.735 INCHES NOMINAL SECOND STEP IN |
| Style Designator | THREADED FLANGED |
| Nominal Thread Size | 2.875 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 1.195 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 16 SINGLE THREADED PORTION |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UN SINGLE THREADED PORTION |
| 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 |
|---|---|
| 2S5123-2 PRIMARY | Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company (USA) |
NSN 4820-00-074-1249 is a Seat,valve, manufactured by Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-074-1249 has 1 manufacturer part number on file: 2S5123-2 (Ruggles-Klingemann Mfg Co Dba the Ruggles-Klingemann Company).
Key specifications for 2S5123-2: Flange Seat to Disk End Height: 0.443 INCHES NOMINAL IN; Flange Diameter: 3.135 INCHES NOMINAL IN; Thread Length: 0.342 INCHES NOMINAL SINGLE THREADED PORTION IN; Body Stepped Inside Diameter: 1.985 INCHES NOMINAL FIRST STEP IN. 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.