The Seat,valve, cataloged under National Stock Number 4820-00-858-0107, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is General Electric 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-858-0107 |
| Primary Part Number | 101B209CAPIECE1 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | General Electric Company |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.447 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN |
| Flange Diameter | 2.626 INCHES MINIMUM AND 2.631 INCHES MAXIMUM IN |
| Body Outside Diameter | 2.062 INCHES NOMINAL IN |
| Body Stepped Inside Diameter | 0.656 INCHES MINIMUM AND 0.658 INCHES MAXIMUM FIRST STEP IN |
| Body Stepped Inside Diameter | 1.500 INCHES NOMINAL SECOND STEP IN |
| Style Designator | PLAIN FLANGED |
| Material Document and Classification | MIL-R-17131,TY MIL-RCOCR-A MIL SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | QQ-S-763,CL 410,COND T FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Seat Radius | 0.194 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN |
| Under Flange Height | 1.000 INCHES NOMINAL IN |
| Material | STEEL BODY |
| Material | STEEL SEAT |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| 101B209BBPC1 | General Electric Company (USA) |
| 101B209CAPIECE1 PRIMARY | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 101B209CAPC1 | C/1 Advisory reference — outside the item-of-supply concept General Electric Co Naval and Drive Turbine Systems Dept |
| 101B209CAPIECE1 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
| 101B209BBPIECE1 | 5/9 Secondary reference General Electric Co Naval and Drive Turbine Systems Dept |
NSN 4820-00-858-0107 is a Seat,valve, manufactured by General Electric Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-858-0107 has 2 manufacturer part numbers on file: 101B209BBPC1 (General Electric Company), 101B209CAPIECE1 (General Electric Company).
Key specifications for 101B209CAPIECE1: Flange Seat to Disk End Height: 0.447 INCHES MINIMUM AND 0.503 INCHES MAXIMUM IN; Flange Diameter: 2.626 INCHES MINIMUM AND 2.631 INCHES MAXIMUM IN; Body Outside Diameter: 2.062 INCHES NOMINAL IN; Body Stepped Inside Diameter: 0.656 INCHES MINIMUM AND 0.658 INCHES MAXIMUM 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.
NSN 4820-00-858-0107 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.