PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1333Seat,valve

Lawler Manufacturing Company, Inc. · NSN 4820-00-546-5812 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-546-5812 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-546-5812. Primary manufacturer part number: 1333.
Features
  • Seat,valve — FSC 4820
  • Thread Series Designator: UNS SINGLE THREADED PORTION
  • Material: NICKEL ALLOY OVERALL
  • Style Designator: THREADED FLANGED
  • Under Flange Height: 0.438 INCHES NOMINAL IN
  • Thread Length: 0.438 INCHES NOMINAL SINGLE THREADED PORTION IN
  • Thread Class: 2A SINGLE THREADED PORTION A
  • Flange Diameter: 3.250 INCHES NOMINAL IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-00-546-5812, 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 12 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
NSN4820-00-546-5812
Primary Part Number1333
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLawler Manufacturing Company, Inc.
StatusACTIVE
Thread Series DesignatorUNS SINGLE THREADED PORTION
MaterialNICKEL ALLOY OVERALL
Style DesignatorTHREADED FLANGED
Under Flange Height0.438 INCHES NOMINAL IN
Thread Length0.438 INCHES NOMINAL SINGLE THREADED PORTION IN
Thread Class2A SINGLE THREADED PORTION A
Flange Diameter3.250 INCHES NOMINAL IN
Nominal Thread Size2.938 INCHES SINGLE THREADED PORTION IN
Body Inside Diameter2.000 INCHES NOMINAL IN
Thread Quantity Per Inch11 SINGLE THREADED PORTION
Flange Seat to Disk End Height0.375 INCHES NOMINAL IN
Seating Surface ShapeFLAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5930-00-022-81371333 INTERCHANGEABLE
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5342-00-086-09341333 INTERCHANGEABLE
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Cross-Reference Index
Part NumberManufacturer
1333 PRIMARY Lawler Manufacturing Company, Inc. (USA)
Related Parts
5930-00-022-8137INTERCHANGEABLE
SWITCH,ROTARY
1333
5342-00-086-0934INTERCHANGEABLE
CLAMP,CADMIUM PLATE
1333
4820-00-146-0535INTERCHANGEABLE
VALVE,GLOBE
1331T
5950-00-146-2448INTERCHANGEABLE
TRANSFORMER,SPECIAL
1333
6810-00-237-4400INTERCHANGEABLE
DIMETHYL-P-PHENYLENEDIAMINE SULF
6850-00-245-0447INTERCHANGEABLE
CLEANING AND LUBRICATING COMPOUN
SPRAYON 02002
5320-00-423-8038INTERCHANGEABLE
RIVET,SOLID
1333
5342-00-490-1940INTERCHANGEABLE
STRAP,CONDUIT
CL75
5340-00-498-2388INTERCHANGEABLE
LEVER,MANUAL CONTROL
11640398-1
5950-00-518-0703INTERCHANGEABLE
TRANSFORMER,POWER
1333
5930-00-549-0308INTERCHANGEABLE
SWITCH,TOGGLE
682324PC4
5360-00-600-4326INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION

Frequently Asked Questions

What is NSN 4820-00-546-5812?

NSN 4820-00-546-5812 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 4820-00-546-5812?

NSN 4820-00-546-5812 has 1 cross-referenced part number: 1333 (Lawler Manufacturing Company, Inc.).

What NSN replaces 4820-00-546-5812?

There are 12 known substitutes for 4820-00-546-5812: 5930-00-022-8137, 5342-00-086-0934, 4820-00-146-0535 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1333?

Key specifications for 1333: Thread Series Designator: UNS SINGLE THREADED PORTION; Material: NICKEL ALLOY OVERALL; Style Designator: THREADED FLANGED; Under Flange Height: 0.438 INCHES NOMINAL IN. 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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