PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1647Seat,valve

Lawler Manufacturing Company, Inc. · NSN 4820-00-920-2724 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-920-2724 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-920-2724. Primary manufacturer part number: 1647.
Features
  • Seat,valve — FSC 4820
  • Thread Length: 0.372 INCHES NOMINAL SINGLE THREADED PORTION IN
  • Flange Seat to Disk End Height: 0.375 INCHES NOMINAL IN
  • Flange Diameter: 1.875 INCHES NOMINAL IN
  • Seating Surface Shape: ANGULAR
  • Body Inside Diameter: 1.250 INCHES NOMINAL IN
  • Seat Angle in Deg: 32.000 NOMINAL
  • Under Flange Height: 0.531 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-920-2724, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Lawler Manufacturing Company, Inc.. Government technical data includes 8 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-920-2724
Primary Part Number1647
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLawler Manufacturing Company, Inc.
StatusACTIVE
Thread Length0.372 INCHES NOMINAL SINGLE THREADED PORTION IN
Flange Seat to Disk End Height0.375 INCHES NOMINAL IN
Flange Diameter1.875 INCHES NOMINAL IN
Seating Surface ShapeANGULAR
Body Inside Diameter1.250 INCHES NOMINAL IN
Seat Angle in Deg32.000 NOMINAL
Under Flange Height0.531 INCHES NOMINAL IN
Style DesignatorTHREADED FLANGED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6240-00-017-90061007 INTERCHANGEABLE
Lamp,incandescent
Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
5970-00-117-5336 INTERCHANGEABLE
Insulator,standoff
3120-00-142-05141647 INTERCHANGEABLE
Bushing,sleeve
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
4820-00-146-94071647 INTERCHANGEABLE
Valve,ball
Rgi Inc Dba Rgi Inc
5985-00-284-6482487855-1 INTERCHANGEABLE
Support,antenna
L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.
6680-00-337-7051E3602PC4 INTERCHANGEABLE
Splice,air Line
King Engineering Corporation Dba King-Gage Systems
6625-00-435-2338 INTERCHANGEABLE
Meter,electrical Frequency
5935-00-549-2646 INTERCHANGEABLE
Connector,receptacle,electrical
5961-00-617-4750 INTERCHANGEABLE
Semiconductor Device,diode
5950-00-931-39871783709-47 INTERCHANGEABLE
Transformer,audio Frequency
Honeywell International Inc. Dba Honeywell International
Cross-Reference Index
Part NumberManufacturer
1647 PRIMARY Lawler Manufacturing Company, Inc. (USA)
Related Parts
6240-00-017-9006INTERCHANGEABLE
LAMP,INCANDESCENT
1007
5970-00-117-5336INTERCHANGEABLE
INSULATOR,STANDOFF
3120-00-142-0514INTERCHANGEABLE
BUSHING,SLEEVE
1647
4820-00-146-9407INTERCHANGEABLE
VALVE,BALL
1647
5985-00-284-6482INTERCHANGEABLE
SUPPORT,ANTENNA
487855-1
6680-00-337-7051INTERCHANGEABLE
SPLICE,AIR LINE
E3602PC4
6625-00-435-2338INTERCHANGEABLE
METER,ELECTRICAL FREQUENCY
5935-00-549-2646INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5961-00-617-4750INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
5950-00-931-3987INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
1783709-47
5915-01-005-9445INTERCHANGEABLE
FILTER,LOW PASS
158872-01
5310-01-246-2486INTERCHANGEABLE
WASHER,KEY
16-47

Frequently Asked Questions

What is NSN 4820-00-920-2724?

NSN 4820-00-920-2724 is a Seat,valve, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-920-2724?

NSN 4820-00-920-2724 has 1 cross-referenced part number: 1647 (Lawler Manufacturing Company, Inc.).

What NSN replaces 4820-00-920-2724?

There are 12 known substitutes for 4820-00-920-2724: 6240-00-017-9006, 5970-00-117-5336, 3120-00-142-0514 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1647?

Key specifications for 1647: Thread Length: 0.372 INCHES NOMINAL SINGLE THREADED PORTION IN; Flange Seat to Disk End Height: 0.375 INCHES NOMINAL IN; Flange Diameter: 1.875 INCHES NOMINAL IN; Seating Surface Shape: ANGULAR. 8 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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