The Ring,seal,gearbox, cataloged under National Stock Number 2835-00-557-0857, is classified within Federal Supply Class 2835 (Gas Turbines and Jet Engines; Non-aircraft Prime Mover, Aircraft Non-prime Mover, and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Thomas Instrument, Incorporated. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2835-00-557-0857 |
| Primary Part Number | 87260-01 |
| Item Name | Ring,seal,gearbox |
| FSC / FSG | 2835 / 28 — Gas Turbines and Jet Engines; Non-aircraft Prime Mover, Aircraft Non-prime Mover, and Components |
| Manufacturer | Thomas Instrument, Incorporated |
| Status | ACTIVE |
| General Characteristics Item Description | COPPER ALLOY,QQ-C-390,ALLOY E3,TYPE III |
| 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 |
|---|---|
| 87260-01 | Thomas Instrument, Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 366698-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2835-00-557-0857 is a Ring,seal,gearbox, manufactured by Thomas Instrument, Incorporated, classified under FSC 2835, Gas Turbines and Jet Engines; Non-aircraft Prime Mover, Aircraft Non-prime Mover, and Components. Status: active.
NSN 2835-00-557-0857 has 1 manufacturer part number on file: 87260-01 (Thomas Instrument, Incorporated).
1 possible match (shared part number, not a government interchangeability claim): 5970-01-145-4433. Verify interchangeability with system specifications before substitution.
Key specifications for 87260-01: General Characteristics Item Description: COPPER ALLOY,QQ-C-390,ALLOY E3,TYPE III; End Item Identification: GEARBOX,ACCESSORY DRIVE,TURBINE ENGINE,PART NUMBER 386721-1. 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.