PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2735Seat,valve

Lawler Manufacturing Company, Inc. · NSN 4820-00-756-5538 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-756-5538 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-756-5538. Primary manufacturer part number: 2735.
Features
  • Seat,valve — FSC 4820
  • Under Flange Height: 0.250 INCHES NOMINAL IN
  • Nominal Thread Size: 1.625 INCHES SINGLE THREADED PORTION IN
  • Thread Series Designator: UN SINGLE THREADED PORTION
  • Style Designator: THREADED FLANGED
  • Material: NICKEL ALLOY OVERALL
  • Body Inside Diameter: 1.250 INCHES NOMINAL IN
  • Seating Surface Shape: FLAT
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 4820-00-756-5538, 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
NSN4820-00-756-5538
Primary Part Number2735
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLawler Manufacturing Company, Inc.
StatusACTIVE
Under Flange Height0.250 INCHES NOMINAL IN
Nominal Thread Size1.625 INCHES SINGLE THREADED PORTION IN
Thread Series DesignatorUN SINGLE THREADED PORTION
Style DesignatorTHREADED FLANGED
MaterialNICKEL ALLOY OVERALL
Body Inside Diameter1.250 INCHES NOMINAL IN
Seating Surface ShapeFLAT
Flange Diameter1.750 INCHES NOMINAL IN
Thread Class2A SINGLE THREADED PORTION A
Thread Length0.625 INCHES NOMINAL SINGLE THREADED PORTION IN
Thread Quantity Per Inch18 SINGLE THREADED PORTION
Flange Seat to Disk End Height0.375 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-039-7698GA51613 INTERCHANGEABLE
Coil,radio Frequency
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
2530-00-112-00163912122 INTERCHANGEABLE
Cylinder Assembly,hydraulic Brak
General Motors Llc Dba General Motors Llc
1680-00-347-0524C2735 INTERCHANGEABLE
Housing,gear
Aerocontrolex Group, Inc. Div Talley Actuators
2040-00-393-3717 INTERCHANGEABLE
Rudder and Stock
3040-00-628-6280 INTERCHANGEABLE
Cam,control
5360-00-840-1936 INTERCHANGEABLE
Spring,helical,extension
5315-00-844-3662MS16562-62 INTERCHANGEABLE
Pin,spring
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5935-00-855-912627-35 INTERCHANGEABLE
Connector,plug,electrical
Amphenol Corporation Div Amphenol Rf
6520-01-063-6875JMMC-00068 INTERCHANGEABLE
Floss,unwaxed,dental
Jm Murray Center Inc
6930-01-129-7799273-5 INTERCHANGEABLE
Co-Ordinate Motion Base,display
Brunson Instrument Company Dba Brunson Instrument Co
Cross-Reference Index
Part NumberManufacturer
2735 PRIMARY Lawler Manufacturing Company, Inc. (USA)
Related Parts
5950-00-039-7698INTERCHANGEABLE
COIL,RADIO FREQUENCY
GA51613
2530-00-112-0016INTERCHANGEABLE
CYLINDER ASSEMBLY,HYDRAULIC BRAK
3912122
1680-00-347-0524INTERCHANGEABLE
HOUSING,GEAR
C2735
2040-00-393-3717INTERCHANGEABLE
RUDDER AND STOCK
3040-00-628-6280INTERCHANGEABLE
CAM,CONTROL
5360-00-840-1936INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
5315-00-844-3662INTERCHANGEABLE
PIN,SPRING
MS16562-62
5935-00-855-9126INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
27-35
6520-01-063-6875INTERCHANGEABLE
FLOSS,UNWAXED,DENTAL
JMMC-00068
6930-01-129-7799INTERCHANGEABLE
CO-ORDINATE MOTION BASE,DISPLAY
273-5
6540-01-145-5210INTERCHANGEABLE
BAG,PROTECTIVE,VISION,CHARTS
2-735
5130-01-158-3593INTERCHANGEABLE
BIT,SCREWDRIVER
273-5

Frequently Asked Questions

What is NSN 4820-00-756-5538?

NSN 4820-00-756-5538 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 4820-00-756-5538?

NSN 4820-00-756-5538 has 1 cross-referenced part number: 2735 (Lawler Manufacturing Company, Inc.).

What NSN replaces 4820-00-756-5538?

There are 12 known substitutes for 4820-00-756-5538: 5950-00-039-7698, 2530-00-112-0016, 1680-00-347-0524 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2735?

Key specifications for 2735: Under Flange Height: 0.250 INCHES NOMINAL IN; Nominal Thread Size: 1.625 INCHES SINGLE THREADED PORTION IN; Thread Series Designator: UN SINGLE THREADED PORTION; Style Designator: THREADED FLANGED. 12 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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