The Seal,balance Piston, cataloged under National Stock Number 2840-01-034-8261, is classified within Federal Supply Class 2840 (Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Rolls-Royce Corporation. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-034-8261 |
| Primary Part Number | 6876919 |
| Item Name | Seal,balance Piston |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| General Characteristics Item Description | CRES,AMS5660 OR AMS5661,63 MICROINCH AA SURFACE FINISH OVERALL,0.440 IN. MIN,0.450 IN. MAX O/A LG,4.2795 IN. MIN,4.2805 IN. MAX OD,4.190 IN. MIN,4.200 IN. MAX ID,18 SERRATIONS ON ID,4.1573 IN. MIN,4.1583 IN. MAX MINOR DIA,4.1873 IN. MIN,4.1983 IN. MAX MAJOR DIA SERRATIONS,0.0215 IN. NOM C TO C DISTANCE BETWEEN TEETH IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
NSN 2840-01-034-8261 is a Seal,balance Piston, manufactured by Rolls-Royce Corporation, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-01-034-8261 has 2 manufacturer part numbers on file: 6876919 (Mtu Aero Engines Ag), 6876919 (Rolls-Royce Corporation).
Key specifications for 6876919: General Characteristics Item Description: CRES,AMS5660 OR AMS5661,63 MICROINCH AA SURFACE FINISH OVERALL,0.440 IN. MIN,0.450 IN. MAX O/A LG,4.2795 IN. MIN,4.2805 IN. MAX OD,4.190 IN. MIN,4.200 IN. MAX ID,18 SERRATIONS ON ID,4.1573 IN. MIN,4.1583 IN. MAX MINOR DIA,4.1873 IN. MIN,4.1983 IN. MAX MAJOR DIA SERRATIONS,0.0215 IN. NOM C TO C DISTANCE BETWEEN TEETH IN. 1 specification is 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.