PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7S8378Ring,piston

Caterpillar Inc Div Caterpillar Defense · NSN 2815-00-009-2125 · FSC 2815 · No Item Name Available
Verified by PartsTable
NSN 2815-00-009-2125 — this item is cataloged by the U.S. Government under National Stock Number 2815-00-009-2125. Primary manufacturer part number: 7S8378.
Features
  • Ring,piston — FSC 2815
  • 4 verified cross-references
  • Primary manufacturer: Caterpillar Inc Div Caterpillar Defense
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ring,piston, cataloged under National Stock Number 2815-00-009-2125, is classified within Federal Supply Class 2815 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameRing,piston
FSC / FSG2815 — No Item Name Available (FSG 28)
ManufacturersIndustrial Parts Depot, Llc Dba Ipd (CAGE 55883); Caterpillar Inc Div Caterpillar Defense (CAGE 11083); Kaydon Ring & Seal Inc Dba Skf Precision Technologies (CAGE 75370)
Technical Specifications
ParameterValue
NSN2815-00-009-2125
Primary Part Number7S8378
Item NameRing,piston
FSC / FSG2815 / 28 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5306-00-060-62895242-5 INTERCHANGEABLE
Bolt,internally Relieved Body
Goodrich Aerospace Canada Ltd
5905-00-152-99915242-5 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
General Microwave Corporation Div Kratos Microwave Electronics
5930-00-519-8593 INTERCHANGEABLE
Switch,slide
1420-00-621-7712 INTERCHANGEABLE
Mirror,recorder Set
3020-00-751-893852425 INTERCHANGEABLE
Guard,mechanical Drive
Stewart & Stevenson Power Products Llc
5950-01-084-0690 INTERCHANGEABLE
Transformer,power
4720-01-108-202420874 INTERCHANGEABLE
Hose,preformed
Gates Corporation
4210-01-154-654452425 INTERCHANGEABLE
Bracket,fire Extinguisher
Tyco Fire Products Lp
1560-01-459-634652425 INTERCHANGEABLE
Strut,aircraft
Aluminum Co of America
Cross-Reference Index
Part NumberManufacturer
7S8378 Industrial Parts Depot, Llc Dba Ipd (USA)
IPD7S8378 Industrial Parts Depot, Llc Dba Ipd (USA)
7S8378 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
52425 PRIMARY Kaydon Ring & Seal Inc Dba Skf Precision Technologies (USA)
Related Parts
5306-00-060-6289INTERCHANGEABLE
BOLT,INTERNALLY RELIEVED BODY
5242-5
5905-00-152-9991INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
5242-5
5930-00-519-8593INTERCHANGEABLE
SWITCH,SLIDE
1420-00-621-7712INTERCHANGEABLE
MIRROR,RECORDER SET
3020-00-751-8938INTERCHANGEABLE
GUARD,MECHANICAL DRIVE
52425
5950-01-084-0690INTERCHANGEABLE
TRANSFORMER,POWER
4720-01-108-2024INTERCHANGEABLE
HOSE,PREFORMED
20874
4210-01-154-6544INTERCHANGEABLE
BRACKET,FIRE EXTINGUISHER
52425
1560-01-459-6346INTERCHANGEABLE
STRUT,AIRCRAFT
52425

Frequently Asked Questions

What is NSN 2815-00-009-2125?

NSN 2815-00-009-2125 is a Ring,piston, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2815 (No Item Name Available). Status: active.

What are the part numbers for NSN 2815-00-009-2125?

NSN 2815-00-009-2125 has 4 cross-referenced part numbers: 7S8378 (Industrial Parts Depot, Llc Dba Ipd), IPD7S8378 (Industrial Parts Depot, Llc Dba Ipd), 7S8378 (Caterpillar Inc Div Caterpillar Defense), 52425 (Kaydon Ring & Seal Inc Dba Skf Precision Technologies).

What NSN replaces 2815-00-009-2125?

There are 9 known substitutes for 2815-00-009-2125: 5306-00-060-6289, 5905-00-152-9991, 5930-00-519-8593 and 6 more. Verify interchangeability with system specifications before substitution.

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