PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

838949Subplate Assembly,valve

Eaton Aerospace, Llc Dba Jackson South · NSN 4820-01-257-4933 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-257-4933 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-257-4933. Primary manufacturer part number: 838949.
Features
  • Subplate Assembly,valve — FSC 4820
  • General Characteristics Item Description: INCLUDES SLEEVE,O-RINGS,BACK-UP RINGS,NAMEPLATE,SCREWS AND INSERTS
  • 2 verified cross-references
  • Primary manufacturer: Eaton Aerospace, Llc Dba Jackson South
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Subplate Assembly,valve, cataloged under National Stock Number 4820-01-257-4933, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-257-4933
Primary Part Number838949
Item NameSubplate Assembly,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEaton Aerospace, Llc Dba Jackson South
StatusACTIVE
General Characteristics Item DescriptionINCLUDES SLEEVE,O-RINGS,BACK-UP RINGS,NAMEPLATE,SCREWS AND INSERTS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
2520-00-737-7005838949 INTERCHANGEABLE
Plate
General Motors Llc Dba General Motors Llc
Cross-Reference Index
Part NumberManufacturer
838955 PIECE 39 Eaton Aerospace, Llc Dba Jackson South (USA)
838949 PRIMARY Eaton Aerospace, Llc Dba Jackson South (USA)
Related Parts
2520-00-737-7005INTERCHANGEABLE
PLATE
838949

Frequently Asked Questions

What is NSN 4820-01-257-4933?

NSN 4820-01-257-4933 is a Subplate Assembly,valve, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-257-4933?

NSN 4820-01-257-4933 has 2 cross-referenced part numbers: 838955 PIECE 39 (Eaton Aerospace, Llc Dba Jackson South), 838949 (Eaton Aerospace, Llc Dba Jackson South).

What NSN replaces 4820-01-257-4933?

There is 1 known substitute for 4820-01-257-4933: 2520-00-737-7005. Verify interchangeability with system specifications before substitution.

What are the specifications of 838949?

Key specifications for 838949: General Characteristics Item Description: INCLUDES SLEEVE,O-RINGS,BACK-UP RINGS,NAMEPLATE,SCREWS AND INSERTS. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com