PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12377Piston and Cup Assembly

Aerco International, Inc. Dba Aerco International Inc · NSN 4820-00-622-6813 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-622-6813 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-622-6813. Primary manufacturer part number: 12377.
Features
  • Piston and Cup Assembly — FSC 4820
  • General Characteristics Item Description: CONSISTS OF THE FOLLOWING ITEMS; STEM,PISTON; PISTON; CUP,PISTON; RETAINER,PISTON CUP,ONE EA; SCREW,CAP,SOCKET HEAD,TWO EA
  • 2 verified cross-references
  • Primary manufacturer: Aerco International, Inc. Dba Aerco International Inc
Applications
  • Flow control in piping systems
  • Water treatment infrastructure
  • Industrial process control
General Description

The Piston and Cup Assembly, cataloged under National Stock Number 4820-00-622-6813, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Aerco International, Inc. Dba Aerco International Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 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: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-622-6813
Primary Part Number12377
Item NamePiston and Cup Assembly
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAerco International, Inc. Dba Aerco International Inc
StatusCANCELLED
General Characteristics Item DescriptionCONSISTS OF THE FOLLOWING ITEMS; STEM,PISTON; PISTON; CUP,PISTON; RETAINER,PISTON CUP,ONE EA; SCREW,CAP,SOCKET HEAD,TWO EA
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5305-00-191-6222 INTERCHANGEABLE
Screw,machine
6145-00-393-40758860 INTERCHANGEABLE
Cable,power,electrical
Janor Wire & Cable Corp
2915-00-441-990812-377 INTERCHANGEABLE
Lobe,pump,fuel
Ontic Engineering & Manufacturing, Inc Dba Ontic Us
5340-00-634-77931102-3 INTERCHANGEABLE
Handle,bow
Adams Rite Aerospace, Inc
5910-00-672-754911023 INTERCHANGEABLE
Capacitor,fixed,plastic Dielectr
Grimes Aerospace Company
5331-00-988-2556 INTERCHANGEABLE
O-Ring
5985-01-043-0141 INTERCHANGEABLE
Antenna
4730-01-056-920211023 INTERCHANGEABLE
Nozzle,spray,fluid-Emulsion
Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
4820-01-186-8444N12377 INTERCHANGEABLE
Disk,nozzle Pin,valve
Leslie Controls, Inc. Dba Leslie Controls Inc
3460-01-203-272511023 INTERCHANGEABLE
Piercer Pilot
Hougen Manufacturing, Inc
Cross-Reference Index
Part NumberManufacturer
11023 Aerco International, Inc. Dba Aerco International Inc (USA)
12377 PRIMARY Aerco International, Inc. Dba Aerco International Inc (USA)
Related Parts
5305-00-191-6222INTERCHANGEABLE
SCREW,MACHINE
6145-00-393-4075INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
8860
2915-00-441-9908INTERCHANGEABLE
LOBE,PUMP,FUEL
12-377
5340-00-634-7793INTERCHANGEABLE
HANDLE,BOW
1102-3
5910-00-672-7549INTERCHANGEABLE
CAPACITOR,FIXED,PLASTIC DIELECTR
11023
5331-00-988-2556INTERCHANGEABLE
O-RING
5985-01-043-0141INTERCHANGEABLE
ANTENNA
4730-01-056-9202INTERCHANGEABLE
NOZZLE,SPRAY,FLUID-EMULSION
11023
4820-01-186-8444INTERCHANGEABLE
DISK,NOZZLE PIN,VALVE
N12377
3460-01-203-2725INTERCHANGEABLE
PIERCER PILOT
11023
5365-01-203-6359INTERCHANGEABLE
RING,CONNECTING,ROUND
96018501
4730-01-212-0276INTERCHANGEABLE
COUPLING,PIPE
12377

Frequently Asked Questions

What is NSN 4820-00-622-6813?

NSN 4820-00-622-6813 is a Piston and Cup Assembly, manufactured by Aerco International, Inc. Dba Aerco International Inc, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-622-6813?

NSN 4820-00-622-6813 has 2 cross-referenced part numbers: 11023 (Aerco International, Inc. Dba Aerco International Inc), 12377 (Aerco International, Inc. Dba Aerco International Inc).

What NSN replaces 4820-00-622-6813?

There are 12 known substitutes for 4820-00-622-6813: 5305-00-191-6222, 6145-00-393-4075, 2915-00-441-9908 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12377?

Key specifications for 12377: End Item Identification: USED ON VALVE PART NO. HLKEXBR1-1/2 IN. IN; General Characteristics Item Description: CONSISTS OF THE FOLLOWING ITEMS; STEM,PISTON; PISTON; CUP,PISTON; RETAINER,PISTON CUP,ONE EA; SCREW,CAP,SOCKET HEAD,TWO EA. 2 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-622-6813 still in active supply?

NSN 4820-00-622-6813 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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