PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20561-801-1Cap,valve

Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace · NSN 4820-01-256-0299 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-256-0299 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-256-0299. Primary manufacturer part number: 20561-801-1.
Features
  • Cap,valve — FSC 4820
  • Material: ALUMINUM ALLOY
  • 3 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
  • Applications requiring Aluminum Alloy construction
General Description

The Cap,valve, cataloged under National Stock Number 4820-01-256-0299, 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 1 verified specification, 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
NSN4820-01-256-0299
Primary Part Number20561-801-1
Item NameCap,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerSargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
StatusACTIVE
MaterialALUMINUM ALLOY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-107-7567140209 INTERCHANGEABLE
Bearing,ball,annular
Fairbanks Morse, Llc
5360-00-200-4118 INTERCHANGEABLE
Spring,helical,compression
5945-00-407-70342056.1 INTERCHANGEABLE
Relay,electromagnetic
Bunn-O-Matic Corporation Div Government Sales
1680-00-420-94792056-1 INTERCHANGEABLE
Strip,retainer,seat
Cr Daniels Inc
5950-00-647-529920561 INTERCHANGEABLE
Transformer,power
Freed Transformer Co
5330-00-907-5175 INTERCHANGEABLE
Packing,preformed
5360-01-079-582719AS680 INTERCHANGEABLE
Spring,leaf
Oshkosh Defense Llc
4820-01-255-904020561-1001-1 INTERCHANGEABLE
Head,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-256-029720561-1002-1 INTERCHANGEABLE
Stem,fluid Valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-256-030920561-850-1 INTERCHANGEABLE
Sleeve and Slide,directional Con
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
20561 FIND 2 Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
20561 Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
20561-801-1 PRIMARY Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace (USA)
Related Parts
3110-00-107-7567INTERCHANGEABLE
BEARING,BALL,ANNULAR
140209
5360-00-200-4118INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
5945-00-407-7034INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
2056.1
1680-00-420-9479INTERCHANGEABLE
STRIP,RETAINER,SEAT
2056-1
5950-00-647-5299INTERCHANGEABLE
TRANSFORMER,POWER
20561
5330-00-907-5175INTERCHANGEABLE
PACKING,PREFORMED
5360-01-079-5827INTERCHANGEABLE
SPRING,LEAF
19AS680
4820-01-255-9040INTERCHANGEABLE
HEAD,VALVE
20561-1001-1
4820-01-256-0297INTERCHANGEABLE
STEM,FLUID VALVE
20561-1002-1
4820-01-256-0309INTERCHANGEABLE
SLEEVE AND SLIDE,DIRECTIONAL CON
20561-850-1
4820-01-256-3658INTERCHANGEABLE
PISTON,VALVE
20561-1003-1
4820-01-256-9100INTERCHANGEABLE
CAP,VALVE
20561-1000-1

Frequently Asked Questions

What is NSN 4820-01-256-0299?

NSN 4820-01-256-0299 is a Cap,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 4820-01-256-0299?

NSN 4820-01-256-0299 has 3 cross-referenced part numbers: 20561 FIND 2 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace), 20561 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace), 20561-801-1 (Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace).

What NSN replaces 4820-01-256-0299?

There are 12 known substitutes for 4820-01-256-0299: 3110-00-107-7567, 5360-00-200-4118, 5945-00-407-7034 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20561-801-1?

Key specifications for 20561-801-1: Material: ALUMINUM ALLOY. 1 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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