PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1541-01Seat,valve

Lawler Manufacturing Company, Inc. · NSN 4820-01-219-1431 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-219-1431 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-219-1431. Primary manufacturer part number: 1541-01.
Features
  • Seat,valve — FSC 4820
  • Material Document and Classification: MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
  • Material: COPPER ALLOY OVERALL
  • Seating Surface Shape: FLAT
  • 3 verified cross-references
  • Primary manufacturer: Lawler Manufacturing Company, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Overall construction
General Description

The Seat,valve, cataloged under National Stock Number 4820-01-219-1431, 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 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references 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
NSN4820-01-219-1431
Primary Part Number1541-01
Item NameSeat,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLawler Manufacturing Company, Inc.
StatusACTIVE
Material Document and ClassificationMIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MaterialCOPPER ALLOY OVERALL
Seating Surface ShapeFLAT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5950-00-421-2976154101 INTERCHANGEABLE
Transformer,power
Raytheon Company Dba Raytheon Co
5815-00-676-6942154101 INTERCHANGEABLE
Plate,rear,teletypewriter
Telemechanics Inc
5331-00-950-82172J8163 INTERCHANGEABLE
O-Ring
Caterpillar Inc Div Caterpillar Defense
5340-01-150-1368154101 INTERCHANGEABLE
Standoff,threaded,spacing
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5355-01-219-1483304-00 INTERCHANGEABLE
Knob
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
4820-01-219-2129285-00 INTERCHANGEABLE
Guide,valve Stem
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
6515-01-346-920750-4561 INTERCHANGEABLE
Blade,retractor,abdominal
Codman & Shurtleff Inc
6220-01-496-9873154101 INTERCHANGEABLE
Light Source,autoco
United States Department of Us Army Peo Stri /simulation,training, Instrumentation/
4730-01-725-71051541-01 INTERCHANGEABLE
Union,pipe
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
Cross-Reference Index
Part NumberManufacturer
72015 Lawler Manufacturing Company, Inc. (USA)
72015 PIECE 22 Lawler Manufacturing Company, Inc. (USA)
1541-01 PRIMARY Lawler Manufacturing Company, Inc. (USA)
Related Parts
5950-00-421-2976INTERCHANGEABLE
TRANSFORMER,POWER
154101
5815-00-676-6942INTERCHANGEABLE
PLATE,REAR,TELETYPEWRITER
154101
5331-00-950-8217INTERCHANGEABLE
O-RING
2J8163
5340-01-150-1368INTERCHANGEABLE
STANDOFF,THREADED,SPACING
154101
5355-01-219-1483INTERCHANGEABLE
KNOB
304-00
4820-01-219-2129INTERCHANGEABLE
GUIDE,VALVE STEM
285-00
6515-01-346-9207INTERCHANGEABLE
BLADE,RETRACTOR,ABDOMINAL
50-4561
6220-01-496-9873INTERCHANGEABLE
LIGHT SOURCE,AUTOCO
154101
4730-01-725-7105INTERCHANGEABLE
UNION,PIPE
1541-01

Frequently Asked Questions

What is NSN 4820-01-219-1431?

NSN 4820-01-219-1431 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 4820-01-219-1431?

NSN 4820-01-219-1431 has 3 cross-referenced part numbers: 72015 (Lawler Manufacturing Company, Inc.), 72015 PIECE 22 (Lawler Manufacturing Company, Inc.), 1541-01 (Lawler Manufacturing Company, Inc.).

What NSN replaces 4820-01-219-1431?

There are 9 known substitutes for 4820-01-219-1431: 5950-00-421-2976, 5815-00-676-6942, 5331-00-950-8217 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1541-01?

Key specifications for 1541-01: Material Document and Classification: MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Material: COPPER ALLOY OVERALL; Seating Surface Shape: FLAT. 3 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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