PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21227Parts Kit,valve

Hydro Engineering Innovation, Llc · NSN 4820-01-273-0551 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-273-0551 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-273-0551. Primary manufacturer part number: 21227.
Features
  • Parts Kit,valve — FSC 4820
  • Component Quantity: 7
  • Nonsupply Items and Quantities: VALVE BALL 1;VALVE SPRING 1;O-RING,SEAT 1;O-RING,CONTROL BOLT 1;O-RING,SEAT 1;VALVE SEAT 1;RETAINING RING,SEAT 1
  • 3 verified cross-references
  • Primary manufacturer: Hydro Engineering Innovation, Llc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Parts Kit,valve, cataloged under National Stock Number 4820-01-273-0551, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hydro Engineering Innovation, Llc. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, 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
NSN4820-01-273-0551
Primary Part Number21227
Item NameParts Kit,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerHydro Engineering Innovation, Llc
StatusACTIVE
Component Quantity7
Nonsupply Items and QuantitiesVALVE BALL 1;VALVE SPRING 1;O-RING,SEAT 1;O-RING,CONTROL BOLT 1;O-RING,SEAT 1;VALVE SEAT 1;RETAINING RING,SEAT 1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5945-00-232-5884A8769-1Y INTERCHANGEABLE
Relay,electromagnetic
Olympic Controls Corp
2810-00-310-8797 INTERCHANGEABLE
Neck,oil Filler
5935-00-350-1890131-1028 INTERCHANGEABLE
Adapter,connector
Amphenol Corporation Div Amphenol Rf
3120-00-371-638921-227 INTERCHANGEABLE
Bearing,sleeve
Dresser Industries Inc Leroi Div
5940-00-502-1455SCB18902 INTERCHANGEABLE
Terminal Board
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5360-00-527-106821250 INTERCHANGEABLE
Spring,helical,compression
Hydro-Aire Aerospace Corp
4520-00-566-2072 INTERCHANGEABLE
Heating Element,electrical,nonim
5935-00-905-816645-5250S-464-1 INTERCHANGEABLE
Connector Body,plug,electrical
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
5935-00-905-816945-5250S-464-3 INTERCHANGEABLE
Connector Body,plug,electrical
Winchester Interconnect Corporation Dba Winchester Interconnect Div Winchester Interconnect
5935-00-905-8173E622379-4 INTERCHANGEABLE
Connector Body,plug,electrical
Raytheon Co
Cross-Reference Index
Part NumberManufacturer
21227 PRIMARY Hydro Engineering Innovation, Llc (USA)
21250 Giant Products Corp (USA)
21227 Giant Industries, Inc Div Giant Industries (USA)
Related Parts
5945-00-232-5884INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
A8769-1Y
2810-00-310-8797INTERCHANGEABLE
NECK,OIL FILLER
5935-00-350-1890INTERCHANGEABLE
ADAPTER,CONNECTOR
131-1028
3120-00-371-6389INTERCHANGEABLE
BEARING,SLEEVE
21-227
5940-00-502-1455INTERCHANGEABLE
TERMINAL BOARD
SCB18902
5360-00-527-1068INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
21250
4520-00-566-2072INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
5935-00-905-8166INTERCHANGEABLE
CONNECTOR BODY,PLUG,ELECTRICAL
45-5250S-464-1
5935-00-905-8169INTERCHANGEABLE
CONNECTOR BODY,PLUG,ELECTRICAL
45-5250S-464-3
5935-00-905-8173INTERCHANGEABLE
CONNECTOR BODY,PLUG,ELECTRICAL
E622379-4
6665-01-069-1715INTERCHANGEABLE
DETECTOR UNIT,CHEMICAL AGENT AUT
21-250
4320-01-219-0958INTERCHANGEABLE
HANGER AND PISTON ASSEMBLY
21227

Frequently Asked Questions

What is NSN 4820-01-273-0551?

NSN 4820-01-273-0551 is a Parts Kit,valve, manufactured by Hydro Engineering Innovation, Llc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-273-0551?

NSN 4820-01-273-0551 has 3 cross-referenced part numbers: 21227 (Hydro Engineering Innovation, Llc), 21250 (Giant Products Corp), 21227 (Giant Industries, Inc Div Giant Industries).

What NSN replaces 4820-01-273-0551?

There are 12 known substitutes for 4820-01-273-0551: 5945-00-232-5884, 2810-00-310-8797, 5935-00-350-1890 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21227?

Key specifications for 21227: Component Quantity: 7; Nonsupply Items and Quantities: VALVE BALL 1;VALVE SPRING 1;O-RING,SEAT 1;O-RING,CONTROL BOLT 1;O-RING,SEAT 1;VALVE SEAT 1;RETAINING RING,SEAT 1. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com