PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2474Seat,valve

Flowserve Inc · NSN 4820-01-145-7649 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-145-7649 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-145-7649. Primary manufacturer part number: 2474.
Features
  • Seat,valve — FSC 4820
  • Nominal Thread Size: 1.312 INCHES SINGLE THREADED PORTION IN
  • Thread Series Designator: UN SINGLE THREADED PORTION
  • Material: STEEL CORROSION RESISTING BODY
  • Style Designator: THREADED FLANGED
  • Thread Quantity Per Inch: 16 SINGLE THREADED PORTION
  • Under Flange Height: 0.434 INCHES NOMINAL IN
  • Flange Diameter: 1.624 INCHES NOMINAL IN
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 4820-01-145-7649, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Flowserve Inc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-145-7649
Primary Part Number2474
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerFlowserve Inc
StatusACTIVE
Nominal Thread Size1.312 INCHES SINGLE THREADED PORTION IN
Thread Series DesignatorUN SINGLE THREADED PORTION
MaterialSTEEL CORROSION RESISTING BODY
Style DesignatorTHREADED FLANGED
Thread Quantity Per Inch16 SINGLE THREADED PORTION
Under Flange Height0.434 INCHES NOMINAL IN
Flange Diameter1.624 INCHES NOMINAL IN
Thread Class2A SINGLE THREADED PORTION A
Body Inside Diameter0.825 INCHES NOMINAL IN
Thread Length0.330 INCHES NOMINAL SINGLE THREADED PORTION IN
Seat Angle in Deg20.000 NOMINAL
Seating Surface ShapeANGULAR
Flange Seat to Disk End Height0.300 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5950-00-043-5253 INTERCHANGEABLE
Transformer,power
3110-00-100-07252474 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5331-00-166-1087AS3581-015 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
5315-00-442-60762474 INTERCHANGEABLE
Pin,straight,headless
Eaton Aerospace, Llc Dba Jackson South
5950-00-757-764166264-2 INTERCHANGEABLE
Transformer,audio Frequency
Ge Aviation Systems Llc Dba Ge Aviation
5895-01-181-54702474 INTERCHANGEABLE
Panel,indicator
General Dynamics Ots (aerospace), Inc. Dba General Dynamics Ordinance and Tactical Systems Div Seattle Operations
2920-01-255-8806MD085766 INTERCHANGEABLE
Lead Set,ignition,engine
Chrysler Realty Company Llc Dba Daimler Chrysler
4320-01-444-27732474 INTERCHANGEABLE
Pump,coolant
Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc.
5310-01-652-2681 INTERCHANGEABLE
Washer,flat
Cross-Reference Index
Part NumberManufacturer
2474 PRIMARY Flowserve Inc (USA)
Related Parts
5950-00-043-5253INTERCHANGEABLE
TRANSFORMER,POWER
3110-00-100-0725INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
2474
5331-00-166-1087INTERCHANGEABLE
O-RING
AS3581-015
5315-00-442-6076INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
2474
5950-00-757-7641INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
66264-2
5895-01-181-5470INTERCHANGEABLE
PANEL,INDICATOR
2474
2920-01-255-8806INTERCHANGEABLE
LEAD SET,IGNITION,ENGINE
MD085766
4320-01-444-2773INTERCHANGEABLE
PUMP,COOLANT
2474
5310-01-652-2681INTERCHANGEABLE
WASHER,FLAT

Frequently Asked Questions

What is NSN 4820-01-145-7649?

NSN 4820-01-145-7649 is a Seat,valve, manufactured by Flowserve Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-145-7649?

NSN 4820-01-145-7649 has 1 cross-referenced part number: 2474 (Flowserve Inc).

What NSN replaces 4820-01-145-7649?

There are 9 known substitutes for 4820-01-145-7649: 5950-00-043-5253, 3110-00-100-0725, 5331-00-166-1087 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2474?

Key specifications for 2474: Nominal Thread Size: 1.312 INCHES SINGLE THREADED PORTION IN; Thread Series Designator: UN SINGLE THREADED PORTION; Material: STEEL CORROSION RESISTING BODY; Style Designator: THREADED FLANGED. 13 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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