PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21126142Guide,valve Stem

Leslie Controls, Inc. Dba Leslie Controls Inc · NSN 4820-01-278-8040 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-278-8040 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-278-8040. Primary manufacturer part number: 21126142.
Features
  • Guide,valve Stem — FSC 4820
  • Material: COPPER ALLOY
  • Style Designator: PLAIN
  • Bore Countersink: INCLUDED
  • 3 verified cross-references
  • Primary manufacturer: Leslie Controls, Inc. Dba Leslie Controls Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy construction
General Description

The Guide,valve Stem, cataloged under National Stock Number 4820-01-278-8040, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-278-8040
Primary Part Number21126142
Item NameGuide,valve Stem
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerLeslie Controls, Inc. Dba Leslie Controls Inc
StatusACTIVE
MaterialCOPPER ALLOY
Style DesignatorPLAIN
Bore CountersinkINCLUDED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5985-00-296-1747C3431 INTERCHANGEABLE
Reflector,antenna
Northrop Grumman Systems Corp Dba Northrop Grumman Systems Corp
5360-00-430-8574 INTERCHANGEABLE
Spring,helical,compression
4820-01-191-2647C-3431J INTERCHANGEABLE
Adapter,valve Position Indicator
Griswold Industries Dba Cla-Val Co
4820-01-278-1029C-3431 ITEM 29 INTERCHANGEABLE
Seat,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
Cross-Reference Index
Part NumberManufacturer
C-3431 Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
21126142 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
C-3431 ITEM 10 PRIMARY Leslie Controls, Inc. Dba Leslie Controls Inc (USA)
Related Parts
5985-00-296-1747INTERCHANGEABLE
REFLECTOR,ANTENNA
C3431
5360-00-430-8574INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
4820-01-191-2647INTERCHANGEABLE
ADAPTER,VALVE POSITION INDICATOR
C-3431J
4820-01-278-1029INTERCHANGEABLE
SEAT,VALVE
C-3431 ITEM 29

Frequently Asked Questions

What is NSN 4820-01-278-8040?

NSN 4820-01-278-8040 is a Guide,valve Stem, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-278-8040?

NSN 4820-01-278-8040 has 3 cross-referenced part numbers: C-3431 (Leslie Controls, Inc. Dba Leslie Controls Inc), 21126142 (Leslie Controls, Inc. Dba Leslie Controls Inc), C-3431 ITEM 10 (Leslie Controls, Inc. Dba Leslie Controls Inc).

What NSN replaces 4820-01-278-8040?

There are 4 known substitutes for 4820-01-278-8040: 5985-00-296-1747, 5360-00-430-8574, 4820-01-191-2647 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21126142?

Key specifications for 21126142: Material: COPPER ALLOY; Style Designator: PLAIN; Bore Countersink: INCLUDED. 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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