PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

42523Ring Set,piston

Napco International Llc Dba Napco International Inc · NSN 2815-00-585-5179 · FSC 2815 · No Item Name Available
Verified by PartsTable
NSN 2815-00-585-5179 — this item is cataloged by the U.S. Government under National Stock Number 2815-00-585-5179. Primary manufacturer part number: 42523.
Features
  • Ring Set,piston — FSC 2815
  • Standard Bore Diameter: 4.500 INCHES IN
  • Ring Set Component Parts: COMPRESSION RING,13035,89923,4,COMPRESSION RING,13447,89923,1,OIL RING,19772,89923,1
  • Piston Accommodation Quantity: 1
  • 3 verified cross-references
  • Primary manufacturer: Napco International Llc Dba Napco International Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ring Set,piston, cataloged under National Stock Number 2815-00-585-5179, is classified within Federal Supply Class 2815 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Napco International Llc Dba Napco International Inc. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2815-00-585-5179
Primary Part Number42523
Item NameRing Set,piston
FSC / FSG2815 / 28 — No Item Name Available
ManufacturerNapco International Llc Dba Napco International Inc
StatusACTIVE
Standard Bore Diameter4.500 INCHES IN
Ring Set Component PartsCOMPRESSION RING,13035,89923,4,COMPRESSION RING,13447,89923,1,OIL RING,19772,89923,1
Piston Accommodation Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5360-00-621-5470N41969 INTERCHANGEABLE
Spring,helical,compression
Leslie Controls, Inc. Dba Leslie Controls Inc
2815-00-785-190542523 INTERCHANGEABLE
Ring Set,piston
Morris Material Handling, Inc.
5998-00-816-55344252-3 INTERCHANGEABLE
Electronic Components Assembly
General Microwave Corporation Div Kratos Microwave Electronics
5940-01-027-592741969 INTERCHANGEABLE
Terminal,quick Disconnect
Te Connectivity Corporation
5950-01-057-0523986215-2B INTERCHANGEABLE
Transformer,power
Raytheon Company Dba Raytheon
6680-01-229-494242523 INTERCHANGEABLE
Transmitter,liquid Quantity
Setra Systems, Inc. Dba Gems Sensors
5998-01-328-521241969 INTERCHANGEABLE
Printed Circuit Board
Thermo Electron Corporation Dba Iec Centrifuge Div Laboratory Equipment Divsion
2510-01-633-492942523-1 INTERCHANGEABLE
Weldment Lockdown
Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service
2510-01-633-493742523-2 INTERCHANGEABLE
Weldment Lockdown
Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service
Cross-Reference Index
Part NumberManufacturer
41969 Coltec Industries Inc. Dba Fairbanks Morse Engine Div Fairbanks Morse Engine (USA)
41969 Napco International Llc Dba Napco International Inc (USA)
42523 PRIMARY Napco International Llc Dba Napco International Inc (USA)
Related Parts
5360-00-621-5470INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
N41969
2815-00-785-1905INTERCHANGEABLE
RING SET,PISTON
42523
5998-00-816-5534INTERCHANGEABLE
ELECTRONIC COMPONENTS ASSEMBLY
4252-3
5940-01-027-5927INTERCHANGEABLE
TERMINAL,QUICK DISCONNECT
41969
5950-01-057-0523INTERCHANGEABLE
TRANSFORMER,POWER
986215-2B
6680-01-229-4942INTERCHANGEABLE
TRANSMITTER,LIQUID QUANTITY
42523
5998-01-328-5212INTERCHANGEABLE
PRINTED CIRCUIT BOARD
41969
2510-01-633-4929INTERCHANGEABLE
WELDMENT LOCKDOWN
42523-1
2510-01-633-4937INTERCHANGEABLE
WELDMENT LOCKDOWN
42523-2

Frequently Asked Questions

What is NSN 2815-00-585-5179?

NSN 2815-00-585-5179 is a Ring Set,piston, manufactured by Napco International Llc Dba Napco International Inc, classified under FSC 2815 (No Item Name Available). Status: active.

What are the part numbers for NSN 2815-00-585-5179?

NSN 2815-00-585-5179 has 3 cross-referenced part numbers: 41969 (Coltec Industries Inc. Dba Fairbanks Morse Engine Div Fairbanks Morse Engine), 41969 (Napco International Llc Dba Napco International Inc), 42523 (Napco International Llc Dba Napco International Inc).

What NSN replaces 2815-00-585-5179?

There are 9 known substitutes for 2815-00-585-5179: 5360-00-621-5470, 2815-00-785-1905, 5998-00-816-5534 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 42523?

Key specifications for 42523: Standard Bore Diameter: 4.500 INCHES IN; Ring Set Component Parts: COMPRESSION RING,13035,89923,4,COMPRESSION RING,13447,89923,1,OIL RING,19772,89923,1; Piston Accommodation Quantity: 1. 3 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