PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

9049Seat,valve

Derbyshire Machine & Tool Co · NSN 4820-00-346-8792 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-346-8792 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-346-8792. Primary manufacturer part number: 9049.
Features
  • Seat,valve — FSC 4820
  • Material: STEEL CORROSION RESISTING BODY
  • Style Designator: PLAIN
  • Body Inside Diameter: 2.000 INCHES NOMINAL IN
  • Seating Surface Shape: FLAT
  • Body Outside Diameter: 3.688 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Derbyshire Machine & Tool Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Body construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-346-8792, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Derbyshire Machine & Tool Co. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-346-8792
Primary Part Number9049
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerDerbyshire Machine & Tool Co
StatusACTIVE
MaterialSTEEL CORROSION RESISTING BODY
Style DesignatorPLAIN
Body Inside Diameter2.000 INCHES NOMINAL IN
Seating Surface ShapeFLAT
Body Outside Diameter3.688 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-014-64839049 INTERCHANGEABLE
Coil,radio Frequency
Gowanda Holdings, Llc Div Gowanda Electronics Corp.
5935-00-078-1656 INTERCHANGEABLE
Connector,plug,electrical
2810-00-118-72029049 INTERCHANGEABLE
Housing Section,oil Pump Assembl
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5940-00-313-24819049 INTERCHANGEABLE
Terminal Pin
Page Chester Ltd Dba Cooperative Industries Div Cooperative Industries Aerospace Defense
5977-00-386-0904 INTERCHANGEABLE
Brush,electrical Contact
4931-00-629-2849904-9 INTERCHANGEABLE
Separator,fluid,kit
King Nutronics Corporation Dba King Nutronics
5915-00-774-5201240-0807-000 INTERCHANGEABLE
Suppressor,parasitic
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5315-00-780-3693 INTERCHANGEABLE
Pin,straight,headed
3610-00-864-27549049 INTERCHANGEABLE
Slide
Stanley Bostitch Inc Sub of the Stanley Works Corp
2920-00-904-8908 INTERCHANGEABLE
Starter,engine,electrical
Cross-Reference Index
Part NumberManufacturer
9049 PRIMARY Derbyshire Machine & Tool Co (USA)
5S1373PC3 Naval Ship Systems Command (USA)
Related Parts
5950-00-014-6483INTERCHANGEABLE
COIL,RADIO FREQUENCY
9049
5935-00-078-1656INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
2810-00-118-7202INTERCHANGEABLE
HOUSING SECTION,OIL PUMP ASSEMBL
9049
5940-00-313-2481INTERCHANGEABLE
TERMINAL PIN
9049
5977-00-386-0904INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
4931-00-629-2849INTERCHANGEABLE
SEPARATOR,FLUID,KIT
904-9
5915-00-774-5201INTERCHANGEABLE
SUPPRESSOR,PARASITIC
240-0807-000
5315-00-780-3693INTERCHANGEABLE
PIN,STRAIGHT,HEADED
3610-00-864-2754INTERCHANGEABLE
SLIDE
9049
2920-00-904-8908INTERCHANGEABLE
STARTER,ENGINE,ELECTRICAL
4510-00-961-7286INTERCHANGEABLE
PARTS KIT,FLUSH VALVE HANDLE
P-6000-MK
5815-01-083-9416INTERCHANGEABLE
OIL,BOTTLE

Frequently Asked Questions

What is NSN 4820-00-346-8792?

NSN 4820-00-346-8792 is a Seat,valve, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-346-8792?

NSN 4820-00-346-8792 has 2 cross-referenced part numbers: 9049 (Derbyshire Machine & Tool Co), 5S1373PC3 (Naval Ship Systems Command).

What NSN replaces 4820-00-346-8792?

There are 12 known substitutes for 4820-00-346-8792: 5950-00-014-6483, 5935-00-078-1656, 2810-00-118-7202 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 9049?

Key specifications for 9049: Material: STEEL CORROSION RESISTING BODY; Style Designator: PLAIN; Overall Height: 2.625 INCHES NOMINAL IN; Body Inside Diameter: 2.000 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.

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