NSN 2835-00-390-3544 · NIIN 003903544 · Part number 87042
Thomas Instrument, Incorporated · FSC 2835 — Gas Turbines and Jet Engines; Non-aircraft Prime Mover, Aircraft Non-prime Mover, and Components · FSG 28 — Engines, Turbines, and Components · CAGE 5H860
Government record, cited
NSN 2835-00-390-3544 — this item is cataloged by the U.S. Government under National Stock Number 2835-00-390-3544. Manufacturer of record part number: 87042.
Also searched as2835-00-390-3544 ·
2835003903544 ·
NIIN 003903544 ·
00-390-3544 ·
FSC 2835 Gas Turbines and Jet Engines; Non-aircraft Prime Mover, Aircraft Non-prime Mover, and Components · CAGE 5H860 · 87042 · 366850-1 · 366850-1
General Characteristics Item Description: STEEL,AMS6415 OR ALLOY 4340 PER M1L-S-5000 OR ALLOY 4130 PER AMS6350 OR M1L-S-18729,4.800 IN. MIN,4.820 IN. MAX,OD,3.030 IN. MIN,3.060 IN. MAX,1D,0.072 IN. MIN,0.078 IN. MAX,THK IN
2 manufacturer part numbers on file
Manufacturer of record: Thomas Instrument, Incorporated
Identification
NSN: 2835-00-390-3544
NIIN: 003903544
FSC: 2835 — Gas Turbines and Jet Engines; Non-aircraft Prime Mover, Aircraft Non-prime Mover, and Components
FSG: 28 — Engines, Turbines, and Components
Primary part number: 87042
Manufacturer: Thomas Instrument, Incorporated
General Description
The Backplate,gearbox, cataloged under National Stock Number 2835-00-390-3544, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
2835-00-390-3544
Primary Part Number
87042
Item Name
Backplate,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
STEEL,AMS6415 OR ALLOY 4340 PER M1L-S-5000 OR ALLOY 4130 PER AMS6350 OR M1L-S-18729,4.800 IN. MIN,4.820 IN. MAX,OD,3.030 IN. MIN,3.060 IN. MAX,1D,0.072 IN. MIN,0.078 IN. MAX,THK IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items3
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4320-01-042-47188704-2POSSIBLE MATCH
RAM,JACK,FIRST STAGE
Possible match (shared part number)Columbus Jack Corporation Div Columbus Jack
4320-01-273-307687042POSSIBLE MATCH
SEAL ASSEMBLY,SHAFT,SPRING LOADE
Possible match (shared part number)Magnetic Seal Llc
5945-01-419-106087042-001POSSIBLE MATCH
RELAY,ELECTROMAGNETIC
Possible match (shared part number)Teledyne Solid State Products Div Teledyne Industries Sub of Teledyne Inc
NSN 2835-00-390-3544 is a Backplate,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.
What part numbers are listed for NSN 2835-00-390-3544?
NSN 2835-00-390-3544 has 2 manufacturer part numbers on file: 87042 (Thomas Instrument, Incorporated), 366850-1 (Service & Sales Inc).
What NSN replaces 2835-00-390-3544?
3 possible matches (shared part number, not a government interchangeability claim): 4320-01-042-4718, 4320-01-273-3076, 5945-01-419-1060. Verify interchangeability with system specifications before substitution.
What are the specifications of 87042?
Key specifications for 87042: General Characteristics Item Description: STEEL,AMS6415 OR ALLOY 4340 PER M1L-S-5000 OR ALLOY 4130 PER AMS6350 OR M1L-S-18729,4.800 IN. MIN,4.820 IN. MAX,OD,3.030 IN. MIN,3.060 IN. MAX,1D,0.072 IN. MIN,0.078 IN. MAX,THK IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 2835-00-390-3544 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.