PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6661Piston,valve

Imi Cash Valve Inc · NSN 4820-01-225-2299 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-225-2299 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-225-2299. Primary manufacturer part number: 6661.
Features
  • Piston,valve — FSC 4820
  • Valve Model Number for Which Designed: TYPE D-53
  • Material: COPPER ALLOY
  • Valve Type for Which Designed: RELIEF
  • Valve Design Control Activity: 71342
  • 1 verified cross-reference
  • Primary manufacturer: Imi Cash Valve Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy construction
General Description

The Piston,valve, cataloged under National Stock Number 4820-01-225-2299, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Imi Cash Valve Inc. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-225-2299
Primary Part Number6661
Item NamePiston,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerImi Cash Valve Inc
StatusACTIVE
Valve Model Number for Which DesignedTYPE D-53
MaterialCOPPER ALLOY
Valve Type for Which DesignedRELIEF
Valve Design Control Activity71342
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5210-00-083-0288599-9642-10 INTERCHANGEABLE
Gage Stock,thickness
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
3930-00-145-6366 INTERCHANGEABLE
Block,slide
3020-00-448-09926661 INTERCHANGEABLE
Gear,internal
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
5960-00-685-8998 INTERCHANGEABLE
Electron Tube
6532-00-914-3069X610NTZS-CA INTERCHANGEABLE
Shirt,operating,surgical
Medline Industries, Lp
5935-01-184-259146-619730 INTERCHANGEABLE
Adapter,electrical Plug,quick Di
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
6505-01-255-90276661 INTERCHANGEABLE
Mexiletine Hydrochloride Capsule
Boehringer Ingelheim Pharmaceuticals Inc
4020-01-352-27293316661 INTERCHANGEABLE
Rope,fibrous
Plymkraft, Inc. Dba Plymkraft Inc Div Columbian Specialty Products Div
6515-01-372-88172970006713 INTERCHANGEABLE
Heel Cup,orthopedic
Alimed, Inc. Dba Alimed Inc
5340-01-663-6109777-1 INTERCHANGEABLE
Holder,door
Eastern Co Div Eberhard Manufacturing
Cross-Reference Index
Part NumberManufacturer
6661 PRIMARY Imi Cash Valve Inc (USA)
Related Parts
5210-00-083-0288INTERCHANGEABLE
GAGE STOCK,THICKNESS
599-9642-10
3930-00-145-6366INTERCHANGEABLE
BLOCK,SLIDE
3020-00-448-0992INTERCHANGEABLE
GEAR,INTERNAL
6661
5960-00-685-8998INTERCHANGEABLE
ELECTRON TUBE
6532-00-914-3069INTERCHANGEABLE
SHIRT,OPERATING,SURGICAL
X610NTZS-CA
5935-01-184-2591INTERCHANGEABLE
ADAPTER,ELECTRICAL PLUG,QUICK DI
46-619730
6505-01-255-9027INTERCHANGEABLE
MEXILETINE HYDROCHLORIDE CAPSULE
6661
4020-01-352-2729INTERCHANGEABLE
ROPE,FIBROUS
3316661
6515-01-372-8817INTERCHANGEABLE
HEEL CUP,ORTHOPEDIC
2970006713
5340-01-663-6109INTERCHANGEABLE
HOLDER,DOOR
777-1

Frequently Asked Questions

What is NSN 4820-01-225-2299?

NSN 4820-01-225-2299 is a Piston,valve, manufactured by Imi Cash Valve Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-225-2299?

NSN 4820-01-225-2299 has 1 cross-referenced part number: 6661 (Imi Cash Valve Inc).

What NSN replaces 4820-01-225-2299?

There are 10 known substitutes for 4820-01-225-2299: 5210-00-083-0288, 3930-00-145-6366, 3020-00-448-0992 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 6661?

Key specifications for 6661: Valve Model Number for Which Designed: TYPE D-53; Material: COPPER ALLOY; Valve Type for Which Designed: RELIEF; Valve Design Control Activity: 71342. 4 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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