PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21198-1005-1Piston,valve

Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace · NSN 4820-01-450-3625 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-450-3625 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-450-3625. Primary manufacturer part number: 21198-1005-1.
Features
  • Piston,valve — FSC 4820
  • Material: STEEL COMP 416
  • Valve Model Number for Which Designed: 21198-002
  • Valve Size for Which Designed: 2.000 INCHES IN
  • Features Provided: SLOTTED
  • Valve Design Control Activity: 78062
  • Material Document and Classification: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE
  • Valve Type for Which Designed: DIRECTIONAL CONTROL LINEAR
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Comp 416 construction
General Description

The Piston,valve, cataloged under National Stock Number 4820-01-450-3625, 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 3 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
NSN4820-01-450-3625
Primary Part Number21198-1005-1
Item NamePiston,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
StatusACTIVE
MaterialSTEEL COMP 416
Valve Model Number for Which Designed21198-002
Valve Size for Which Designed2.000 INCHES IN
Features ProvidedSLOTTED
Valve Design Control Activity78062
Material Document and ClassificationASTM A582 ASSN STD SINGLE MATERIAL RESPONSE
Valve Type for Which DesignedDIRECTIONAL CONTROL LINEAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5305-00-068-7031 INTERCHANGEABLE
Screw,hold-Down
5330-00-162-53853100B11 INTERCHANGEABLE
Gasket
Terex Usa, Llc Dba Terex Equipment Services
5975-00-280-9214 INTERCHANGEABLE
Box Connector,electrical
4320-00-591-2684187 INTERCHANGEABLE
Slinger,pump
Industrial Technologies and Services Llc
3040-00-734-08186759519 INTERCHANGEABLE
Carrier Assembly,hi
Allison Transmission Inc Dba Allison Transmission, Inc
4330-01-136-346121198 INTERCHANGEABLE
Filter,fluid
Electro Impulse Laboratory Inc Dba Electro Impulse Inc
5999-01-268-143321198 INTERCHANGEABLE
Delay Line
Pulse Engineering Inc
4130-01-389-058621198 INTERCHANGEABLE
Filter Media,air Conditioning
Fibrebond Corp
4820-01-443-929820406-1110-1 INTERCHANGEABLE
Piston,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-446-746821198-851-1 INTERCHANGEABLE
Sleeve and Slide,directional Con
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
21198 Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
21198-1005-1 PRIMARY Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
21198 FIND 8 Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
Related Parts
5305-00-068-7031INTERCHANGEABLE
SCREW,HOLD-DOWN
5330-00-162-5385INTERCHANGEABLE
GASKET
3100B11
5975-00-280-9214INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
4320-00-591-2684INTERCHANGEABLE
SLINGER,PUMP
187
3040-00-734-0818INTERCHANGEABLE
CARRIER ASSEMBLY,HI
6759519
4330-01-136-3461INTERCHANGEABLE
FILTER,FLUID
21198
5999-01-268-1433INTERCHANGEABLE
DELAY LINE
21198
4130-01-389-0586INTERCHANGEABLE
FILTER MEDIA,AIR CONDITIONING
21198
4820-01-443-9298INTERCHANGEABLE
PISTON,VALVE
20406-1110-1
4820-01-446-7468INTERCHANGEABLE
SLEEVE AND SLIDE,DIRECTIONAL CON
21198-851-1
3040-01-447-6110INTERCHANGEABLE
SHAFT,SHOULDERED
21198-1000-1
6150-01-486-4723INTERCHANGEABLE
CABLE ASSEMBLY,SPECIAL PURPOSE,E
21198

Frequently Asked Questions

What is NSN 4820-01-450-3625?

NSN 4820-01-450-3625 is a Piston,valve, 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 4820-01-450-3625?

NSN 4820-01-450-3625 has 3 cross-referenced part numbers: 21198 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace), 21198-1005-1 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace), 21198 FIND 8 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace).

What NSN replaces 4820-01-450-3625?

There are 12 known substitutes for 4820-01-450-3625: 5305-00-068-7031, 5330-00-162-5385, 5975-00-280-9214 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21198-1005-1?

Key specifications for 21198-1005-1: Material: STEEL COMP 416; End Item Identification: SEAWOLF CLASS SSN; Valve Model Number for Which Designed: 21198-002; Valve Size for Which Designed: 2.000 INCHES IN. 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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