PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21506Retainer,disk,valve

Barksdale, Inc · NSN 4820-01-228-7804 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-228-7804 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-228-7804. Primary manufacturer part number: 21506.
Features
  • Retainer,disk,valve — FSC 4820
  • 1 verified cross-reference
  • Primary manufacturer: Barksdale, Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Retainer,disk,valve, cataloged under National Stock Number 4820-01-228-7804, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Barksdale, Inc. This item has 1 commercial cross-reference 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
NSN4820-01-228-7804
Primary Part Number21506
Item NameRetainer,disk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerBarksdale, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
1650-00-168-578421506 INTERCHANGEABLE
Cap,valve
Eaton Aerospace Llc
5120-00-752-903121506 INTERCHANGEABLE
Punch,drive Pin
Mayhew Steel Products Inc
1680-00-760-309421506 INTERCHANGEABLE
Control Assembly,push-Pull
Transdigm Inc
6610-00-919-274021506 INTERCHANGEABLE
Diaphragm Assy
Aerosonic Llc
2990-01-059-9440 INTERCHANGEABLE
Piston
6625-01-070-5910623P INTERCHANGEABLE
Lead Set,test
Halsit Holdings Llc Div Halsit Holdings, Llc Dba Abbatron
5120-01-123-013221-506 INTERCHANGEABLE
Inserter,seal
Bosch Automotive Service Solutions Ltd
6685-01-289-0950G21506 INTERCHANGEABLE
Control,temperature,indicating
National Oil Well Dba Iec Baylor
4820-01-338-229321506 INTERCHANGEABLE
Cap,valve
Schneider Electric Systems Usa Inc
2930-01-567-127887687372 INTERCHANGEABLE
Cooler,lubricating Oil,engine
Cnh Industrial America Llc Dba Cnh America
Cross-Reference Index
Part NumberManufacturer
21506 PRIMARY Barksdale, Inc (USA)
Related Parts
1650-00-168-5784INTERCHANGEABLE
CAP,VALVE
21506
5120-00-752-9031INTERCHANGEABLE
PUNCH,DRIVE PIN
21506
1680-00-760-3094INTERCHANGEABLE
CONTROL ASSEMBLY,PUSH-PULL
21506
6610-00-919-2740INTERCHANGEABLE
DIAPHRAGM ASSY
21506
2990-01-059-9440INTERCHANGEABLE
PISTON
6625-01-070-5910INTERCHANGEABLE
LEAD SET,TEST
623P
5120-01-123-0132INTERCHANGEABLE
INSERTER,SEAL
21-506
6685-01-289-0950INTERCHANGEABLE
CONTROL,TEMPERATURE,INDICATING
G21506
4820-01-338-2293INTERCHANGEABLE
CAP,VALVE
21506
2930-01-567-1278INTERCHANGEABLE
COOLER,LUBRICATING OIL,ENGINE
87687372
1005-01-705-8245INTERCHANGEABLE
SEAR
21506

Frequently Asked Questions

What is NSN 4820-01-228-7804?

NSN 4820-01-228-7804 is a Retainer,disk,valve, manufactured by Barksdale, Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-228-7804?

NSN 4820-01-228-7804 has 1 cross-referenced part number: 21506 (Barksdale, Inc).

What NSN replaces 4820-01-228-7804?

There are 11 known substitutes for 4820-01-228-7804: 1650-00-168-5784, 5120-00-752-9031, 1680-00-760-3094 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21506?

Key specifications for 21506: Special Features: BEAD SHAPED. 1 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