PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1642Stem,fluid Valve

Lawler Manufacturing Company, Inc. · NSN 4820-00-834-5270 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-834-5270 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-834-5270. Primary manufacturer part number: 1642.
Features
  • Stem,fluid Valve — FSC 4820
  • Material: STEEL
  • Largest Outside Diameter: 1.063 INCHES NOMINAL IN
  • 1 verified cross-reference
  • Primary manufacturer: Lawler Manufacturing Company, Inc.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel construction
General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-00-834-5270, 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 2 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
NSN4820-00-834-5270
Primary Part Number1642
Item NameStem,fluid Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLawler Manufacturing Company, Inc.
StatusACTIVE
MaterialSTEEL
Largest Outside Diameter1.063 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6240-00-155-77991141 INTERCHANGEABLE
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3445-00-239-07060236 INTERCHANGEABLE
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2805-00-271-906958321A INTERCHANGEABLE
Valve,poppet,engine
Brinkley Technology Group Llc Dba Hercules Manufacturing
4730-00-287-1766SAE J512 4-2 060202BA INTERCHANGEABLE
Elbow,pipe to Tube
Sae International Dba Sae International
2920-00-353-72491GE1003L INTERCHANGEABLE
Cap,ignition Distribution
Prestolite Electric Inc
5330-00-569-3663 INTERCHANGEABLE
Gasket
5905-00-695-4936N16R89603-7577 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Naval Ship Systems Command
6605-00-759-2083 INTERCHANGEABLE
Panel,control
5330-00-927-78421642 INTERCHANGEABLE
Seal,plain Encased
Parker Hannifin Corporation Div Chelsea Products Division
5930-01-033-6979051410 INTERCHANGEABLE
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L3 Technologies, Inc. Div L3 Keo
Cross-Reference Index
Part NumberManufacturer
1642 PRIMARY Lawler Manufacturing Company, Inc. (USA)
Related Parts
6240-00-155-7799INTERCHANGEABLE
LAMP,INCANDESCENT
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3445-00-239-0706INTERCHANGEABLE
SHEARING MACHINE,METAL,SQUARING
0236
2805-00-271-9069INTERCHANGEABLE
VALVE,POPPET,ENGINE
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4730-00-287-1766INTERCHANGEABLE
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2920-00-353-7249INTERCHANGEABLE
CAP,IGNITION DISTRIBUTION
1GE1003L
5330-00-569-3663INTERCHANGEABLE
GASKET
5905-00-695-4936INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
N16R89603-7577
6605-00-759-2083INTERCHANGEABLE
PANEL,CONTROL
5330-00-927-7842INTERCHANGEABLE
SEAL,PLAIN ENCASED
1642
5930-01-033-6979INTERCHANGEABLE
SWITCH,PUSH
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TRANSFORMER,AUDIO FREQUENCY
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WASHER,LOCK
16-42

Frequently Asked Questions

What is NSN 4820-00-834-5270?

NSN 4820-00-834-5270 is a Stem,fluid Valve, manufactured by Lawler Manufacturing Company, Inc., classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-834-5270?

NSN 4820-00-834-5270 has 1 cross-referenced part number: 1642 (Lawler Manufacturing Company, Inc.).

What NSN replaces 4820-00-834-5270?

There are 12 known substitutes for 4820-00-834-5270: 6240-00-155-7799, 3445-00-239-0706, 2805-00-271-9069 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1642?

Key specifications for 1642: Overall Length: 2.563 INCHES NOMINAL IN; Material: STEEL; Largest Outside Diameter: 1.063 INCHES NOMINAL IN. 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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