PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21052-001Valve,restrictor Check

Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace · NSN 4820-01-513-9740 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-513-9740 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-513-9740. Primary manufacturer part number: 21052-001.
Features
  • Valve,restrictor Check — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,restrictor Check, cataloged under National Stock Number 4820-01-513-9740, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-513-9740
Primary Part Number21052-001
Item NameValve,restrictor Check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
4730-00-134-422221052 INTERCHANGEABLE
Clamp,hose
Norma Pennsylvania Inc. Div Breeze Industrial Products
5310-00-261-734000103321 INTERCHANGEABLE
Washer,lock
Rolls-Royce Solutions America Inc
5950-00-295-7823044-2968-01 INTERCHANGEABLE
Reactor
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5945-00-542-0983 INTERCHANGEABLE
Relay,electromagnetic
6625-00-855-595410548236 INTERCHANGEABLE
Indicator,radio Frequency
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
5915-00-921-3827262429-1 INTERCHANGEABLE
Filter,band Pass
Raytheon Company Dba Raytheon Co
5935-01-092-9293 INTERCHANGEABLE
Adapter,connector
5841-01-100-496221052 INTERCHANGEABLE
Plate,mounting,indicator
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
5975-01-291-03610021050230 INTERCHANGEABLE
Rack,post
Newton Instrument Company Dba Newton Instrument Co
5970-01-388-535321052 INTERCHANGEABLE
Insulator,spreader
Science Applications International Corporation
Cross-Reference Index
Part NumberManufacturer
21052-001 PRIMARY Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
21052 Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
Related Parts
4730-00-134-4222INTERCHANGEABLE
CLAMP,HOSE
21052
5310-00-261-7340INTERCHANGEABLE
WASHER,LOCK
00103321
5950-00-295-7823INTERCHANGEABLE
REACTOR
044-2968-01
5945-00-542-0983INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
6625-00-855-5954INTERCHANGEABLE
INDICATOR,RADIO FREQUENCY
10548236
5915-00-921-3827INTERCHANGEABLE
FILTER,BAND PASS
262429-1
5935-01-092-9293INTERCHANGEABLE
ADAPTER,CONNECTOR
5841-01-100-4962INTERCHANGEABLE
PLATE,MOUNTING,INDICATOR
21052
5975-01-291-0361INTERCHANGEABLE
RACK,POST
0021050230
5970-01-388-5353INTERCHANGEABLE
INSULATOR,SPREADER
21052
6525-01-592-9473INTERCHANGEABLE
TEST TOOL,READER,COMPUTED RADIOG
EZCR/DR DIN

Frequently Asked Questions

What is NSN 4820-01-513-9740?

NSN 4820-01-513-9740 is a Valve,restrictor Check, manufactured by Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-513-9740?

NSN 4820-01-513-9740 has 2 cross-referenced part numbers: 21052-001 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace), 21052 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace).

What NSN replaces 4820-01-513-9740?

There are 11 known substitutes for 4820-01-513-9740: 4730-00-134-4222, 5310-00-261-7340, 5950-00-295-7823 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21052-001?

Key specifications for 21052-001: Part Name Assigned by Controlling Agency: RESTRICTOR,MICRO; End Item Identification: RESTRICTOR,MICRO. 2 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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