PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

68338Ring,piston

Textron Lycoming Inc Williamsport Plant · NSN 2810-00-294-3523 · FSC 2810 · No Item Name Available
Verified by PartsTable
NSN 2810-00-294-3523 — this item is cataloged by the U.S. Government under National Stock Number 2810-00-294-3523. Primary manufacturer part number: 68338.
Features
  • Ring,piston — FSC 2810
  • Ring Style: CONCENTRIC
  • Oil Passage Type and Quantity: 10 HOLE HORIZONTALLY THROUGH RING
  • Radial Wall Thickness: 0.1840 INCHES MINIMUM AND 0.1850 INCHES MAXIMUM IN
  • Cross-Sectional Shape Style: STRAIGHT FACE, DOUBLE SCRAPER, W/EXPANDER
  • Joint Style: VERTICAL JOINT
  • Material: IRON OVERALL
  • Oil Passage Type and Quantity: 1 GROOVE OUTSIDE PERIPHERY
Applications
  • Applications requiring Iron Overall construction
General Description

The Ring,piston, cataloged under National Stock Number 2810-00-294-3523, is classified within Federal Supply Class 2810 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Textron Lycoming Inc Williamsport Plant. Government technical data includes 11 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN2810-00-294-3523
Primary Part Number68338
Item NameRing,piston
FSC / FSG2810 / 28 — No Item Name Available
ManufacturerTextron Lycoming Inc Williamsport Plant
StatusCANCELLED
Ring StyleCONCENTRIC
Oil Passage Type and Quantity10 HOLE HORIZONTALLY THROUGH RING
Radial Wall Thickness0.1840 INCHES MINIMUM AND 0.1850 INCHES MAXIMUM IN
Cross-Sectional Shape StyleSTRAIGHT FACE, DOUBLE SCRAPER, W/EXPANDER
Joint StyleVERTICAL JOINT
MaterialIRON OVERALL
Oil Passage Type and Quantity1 GROOVE OUTSIDE PERIPHERY
MaterialSTEEL EXPANDER
Oil Passage Type and Quantity1 GROOVE INSIDE PERIPHERY
FSC Application DataENGINE,AIRCRAFT,RECIPROCATING
Standard Bore Diameter4.875 INCHES IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5950-00-130-17394374 INTERCHANGEABLE
Transformer,power
The Bechdon Company, Llc
5905-00-226-4744 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
5330-00-298-05344374 INTERCHANGEABLE
Seal,plain
Johns Manville Intl
5330-00-317-27924374 INTERCHANGEABLE
Gasket
Eaton Corp Transmission Div
6605-00-352-6726 INTERCHANGEABLE
Converter,regulator
1610-00-483-653867540 INTERCHANGEABLE
Stop-High and Low P
Hamilton Sundstrand Corporation Dba Collins Aerospace
3110-00-602-44487131061-01 INTERCHANGEABLE
Ball,bearing
Warner Robins Air Logistics Center
5330-01-043-878267540 INTERCHANGEABLE
Gasket
John Deer Consumer Products Inc
3120-01-286-3073 INTERCHANGEABLE
Bearing,washer,thrust
2540-01-315-41044374 INTERCHANGEABLE
Belt,vehicular Safety
Indiana Mills & Manufacturing Inc Dba Indiana Mills & Manufacturing Inc
Cross-Reference Index
Part NumberManufacturer
68338 Textron Lycoming Inc Williamsport Plant (USA)
4374 Gould Inc Clevite Engine Parts Div (USA)
67540 Textron Lycoming Inc Williamsport Plant (USA)
Related Parts
5950-00-130-1739INTERCHANGEABLE
TRANSFORMER,POWER
4374
5905-00-226-4744INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
5330-00-298-0534INTERCHANGEABLE
SEAL,PLAIN
4374
5330-00-317-2792INTERCHANGEABLE
GASKET
4374
6605-00-352-6726INTERCHANGEABLE
CONVERTER,REGULATOR
1610-00-483-6538INTERCHANGEABLE
STOP-HIGH AND LOW P
67540
3110-00-602-4448INTERCHANGEABLE
BALL,BEARING
7131061-01
5330-01-043-8782INTERCHANGEABLE
GASKET
67540
3120-01-286-3073INTERCHANGEABLE
BEARING,WASHER,THRUST
2540-01-315-4104INTERCHANGEABLE
BELT,VEHICULAR SAFETY
4374
4140-01-680-4388INTERCHANGEABLE
FAN,CENTRIFUGAL
ILLEVA0385A4
5930-01-689-5359INTERCHANGEABLE
SWITCH BOX

Frequently Asked Questions

What is NSN 2810-00-294-3523?

NSN 2810-00-294-3523 is a Ring,piston, manufactured by Textron Lycoming Inc Williamsport Plant, classified under FSC 2810 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2810-00-294-3523?

NSN 2810-00-294-3523 has 3 cross-referenced part numbers: 68338 (Textron Lycoming Inc Williamsport Plant), 4374 (Gould Inc Clevite Engine Parts Div), 67540 (Textron Lycoming Inc Williamsport Plant).

What NSN replaces 2810-00-294-3523?

There are 12 known substitutes for 2810-00-294-3523: 5950-00-130-1739, 5905-00-226-4744, 5330-00-298-0534 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 68338?

Key specifications for 68338: Ring Style: CONCENTRIC; Oil Passage Type and Quantity: 10 HOLE HORIZONTALLY THROUGH RING; Radial Wall Thickness: 0.1840 INCHES MINIMUM AND 0.1850 INCHES MAXIMUM IN; Overall Width: 0.1350 INCHES MINIMUM AND 0.1450 INCHES MAXIMUM IN. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2810-00-294-3523 still in active supply?

NSN 2810-00-294-3523 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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