PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21261-001Valve,check

Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace · NSN 4820-01-417-2304 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-417-2304 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-417-2304. Primary manufacturer part number: 21261-001.
Features
  • Valve,check — FSC 4820
  • Flow Control Device: POPPET
  • Valve Operation Method: AUTOMATIC
  • Disk Loading Method: SPRING
  • Operating Pressure: 3300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Style Designator: STRAIGHT THRU
  • Mounting Position: HORIZONTAL OR VERTICAL
  • Material: ALUMINUM ALLOY BODY
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Aluminum Alloy Body construction
General Description

The Valve,check, cataloged under National Stock Number 4820-01-417-2304, 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. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references 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
NSN4820-01-417-2304
Primary Part Number21261-001
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
StatusACTIVE
Flow Control DevicePOPPET
Valve Operation MethodAUTOMATIC
Disk Loading MethodSPRING
Operating Pressure3300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Style DesignatorSTRAIGHT THRU
Mounting PositionHORIZONTAL OR VERTICAL
MaterialALUMINUM ALLOY BODY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5307-00-206-4044212 INTERCHANGEABLE
Stud,plain
Industrial Technologies and Services Llc
5310-00-470-609321261 INTERCHANGEABLE
Nut,plain,hexagon
Dresser Industries Inc Waukesha Engine Div
2835-00-654-670321261 INTERCHANGEABLE
Pin Assembly,tie Down
Solar Turbines Incorporated Dba Solar Turbines Incorporated
5330-00-840-6932695862 INTERCHANGEABLE
Gasket
Hamilton Sundstrand Corporation
2990-00-860-97981985 INTERCHANGEABLE
Muffler,exhaust
Arvin Industries Inc
5998-01-097-850521251H INTERCHANGEABLE
Circuit Card Assembly
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
3120-01-199-4453 INTERCHANGEABLE
Bearing,sleeve
6550-01-234-50524321261 INTERCHANGEABLE
Culture Medium,soybean-Casein Di
Cardinal Health 200, Llc
4820-01-416-787831792 INTERCHANGEABLE
Piston,valve
Canyon Engineering Products, Inc.
4820-01-417-231231761 INTERCHANGEABLE
Seat,valve
Canyon Engineering Products, Inc.
Cross-Reference Index
Part NumberManufacturer
21261 Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
21261-001 PRIMARY Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
Related Parts
5307-00-206-4044INTERCHANGEABLE
STUD,PLAIN
212
5310-00-470-6093INTERCHANGEABLE
NUT,PLAIN,HEXAGON
21261
2835-00-654-6703INTERCHANGEABLE
PIN ASSEMBLY,TIE DOWN
21261
5330-00-840-6932INTERCHANGEABLE
GASKET
695862
2990-00-860-9798INTERCHANGEABLE
MUFFLER,EXHAUST
1985
5998-01-097-8505INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
21251H
3120-01-199-4453INTERCHANGEABLE
BEARING,SLEEVE
6550-01-234-5052INTERCHANGEABLE
CULTURE MEDIUM,SOYBEAN-CASEIN DI
4321261
4820-01-416-7878INTERCHANGEABLE
PISTON,VALVE
31792
4820-01-417-2312INTERCHANGEABLE
SEAT,VALVE
31761
4820-01-429-8387INTERCHANGEABLE
SLEEVE,DIRECTIONAL CONTROL LINEA
31791
6520-01-591-4615INTERCHANGEABLE
HANDPIECE,DENTAL
1007.5550

Frequently Asked Questions

What is NSN 4820-01-417-2304?

NSN 4820-01-417-2304 is a Valve,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 4820-01-417-2304?

NSN 4820-01-417-2304 has 2 cross-referenced part numbers: 21261 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace), 21261-001 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace).

What NSN replaces 4820-01-417-2304?

There are 12 known substitutes for 4820-01-417-2304: 5307-00-206-4044, 5310-00-470-6093, 2835-00-654-6703 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21261-001?

Key specifications for 21261-001: End Item Identification: SEAWOLF CLASS SSN; Flow Control Device: POPPET; Valve Operation Method: AUTOMATIC; Disk Loading Method: SPRING. 8 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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