The Seat,valve, cataloged under National Stock Number 4820-00-130-5945, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rolls-Royce Corporation. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-130-5945 |
| Primary Part Number | 6856988 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Body Outside Diameter | 0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN |
| Material Document and Classification | RULON LD,DIXON CORP MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 0.120 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE OVERALL |
| Seat Angle in Deg | 60.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 6856988 | C E I Inc Dba Command Enterprises (USA) |
| 6856988 PRIMARY | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| 6856988 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 10378330 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 4820-00-130-5945 is a Seat,valve, manufactured by Rolls-Royce Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-130-5945 has 2 manufacturer part numbers on file: 6856988 (C E I Inc Dba Command Enterprises), 6856988 (Rolls-Royce Corporation).
Key specifications for 6856988: Body Outside Diameter: 0.325 INCHES MINIMUM AND 0.335 INCHES MAXIMUM IN; Material Document and Classification: RULON LD,DIXON CORP MFR REF SINGLE MATERIAL RESPONSE OVERALL; Body Inside Diameter: 0.120 INCHES MINIMUM AND 0.125 INCHES MAXIMUM IN; End Item Identification: T-63 SERIES ENGINES. 6 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.