PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4143066Frame Section,seat,vehicular

Oshkosh Defense Llc · NSN 2540-01-661-3973 · FSC 2540 · No Item Name Available
Verified by PartsTable
NSN 2540-01-661-3973 — this item is cataloged by the U.S. Government under National Stock Number 2540-01-661-3973. Primary manufacturer part number: 4143066.
Features
  • Frame Section,seat,vehicular — FSC 2540
  • 3 verified cross-references
  • Primary manufacturer: Oshkosh Defense Llc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Frame Section,seat,vehicular, cataloged under National Stock Number 2540-01-661-3973, is classified within Federal Supply Class 2540 (No Item Name Available) of the Vehicular Equipment Components group. The primary manufacturer of record is Oshkosh Defense Llc. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Catalog Facts
Item NameFrame Section,seat,vehicular
FSC / FSG2540 — No Item Name Available (FSG 25)
ManufacturersOshkosh Defense Llc (CAGE 75Q65); Seats Inc Div Seats Incorporated (CAGE 09704)
Technical Specifications
ParameterValue
NSN2540-01-661-3973
Primary Part Number4143066
Item NameFrame Section,seat,vehicular
FSC / FSG2540 / 25 — No Item Name Available
ManufacturerOshkosh Defense Llc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 5
5990-00-621-0352185004 INTERCHANGEABLE
Synchro Transmitter
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5990-00-804-4982800000-689 INTERCHANGEABLE
Synchro,transmitter
Dynalec Corporation
4730-01-122-514618500-42 INTERCHANGEABLE
Strainer Element,sediment
Leslie Controls, Inc. Dba Leslie Controls Inc
4730-01-251-93683006 INTERCHANGEABLE
Fitting,lubrication
Stewart-Warner Corporation
4940-01-560-4096185004 INTERCHANGEABLE
Basket,dipping-Draining
Thermo Forma Inc Div Thermo Forma, Inc.
Cross-Reference Index
Part NumberManufacturer
4143066 PRIMARY Oshkosh Defense Llc (USA)
185004 Seats Inc Div Seats Incorporated (USA)
4143066/75Q65 Oshkosh Defense Llc (USA)
Related Parts
5990-00-621-0352INTERCHANGEABLE
SYNCHRO TRANSMITTER
185004
5990-00-804-4982INTERCHANGEABLE
SYNCHRO,TRANSMITTER
800000-689
4730-01-122-5146INTERCHANGEABLE
STRAINER ELEMENT,SEDIMENT
18500-42
4730-01-251-9368INTERCHANGEABLE
FITTING,LUBRICATION
3006
4940-01-560-4096INTERCHANGEABLE
BASKET,DIPPING-DRAINING
185004

Frequently Asked Questions

What is NSN 2540-01-661-3973?

NSN 2540-01-661-3973 is a Frame Section,seat,vehicular, manufactured by Oshkosh Defense Llc, classified under FSC 2540 (No Item Name Available). Status: active.

What are the part numbers for NSN 2540-01-661-3973?

NSN 2540-01-661-3973 has 3 cross-referenced part numbers: 4143066 (Oshkosh Defense Llc), 185004 (Seats Inc Div Seats Incorporated), 4143066/75Q65 (Oshkosh Defense Llc).

What NSN replaces 2540-01-661-3973?

There are 5 known substitutes for 2540-01-661-3973: 5990-00-621-0352, 5990-00-804-4982, 4730-01-122-5146 and 2 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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