PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18-257Ring,piston

Dresser Industries Inc Waukesha Engine Div · NSN 2805-00-528-6341 · FSC 2805 · No Item Name Available
Verified by PartsTable
NSN 2805-00-528-6341 — this item is cataloged by the U.S. Government under National Stock Number 2805-00-528-6341. Primary manufacturer part number: 18-257.
Features
  • Ring,piston — FSC 2805
  • Material: IRON OVERALL
  • Joint Style: VERTICAL JOINT
  • Ring Style: CONCENTRIC
  • Standard Bore Diameter: 5.000 INCHES IN
  • Radial Wall Thickness: 0.1850 INCHES MINIMUM AND 0.1950 INCHES MAXIMUM IN
  • Cross-Sectional Shape Style: STRAIGHT FACE, BOTTOM RELIEF
  • 1 verified cross-reference
Applications
  • Applications requiring Iron Overall construction
General Description

The Ring,piston, cataloged under National Stock Number 2805-00-528-6341, is classified within Federal Supply Class 2805 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Dresser Industries Inc Waukesha Engine Div. Government technical data includes 6 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN2805-00-528-6341
Primary Part Number18-257
Item NameRing,piston
FSC / FSG2805 / 28 — No Item Name Available
ManufacturerDresser Industries Inc Waukesha Engine Div
StatusCANCELLED
MaterialIRON OVERALL
Joint StyleVERTICAL JOINT
Ring StyleCONCENTRIC
Standard Bore Diameter5.000 INCHES IN
Radial Wall Thickness0.1850 INCHES MINIMUM AND 0.1950 INCHES MAXIMUM IN
Cross-Sectional Shape StyleSTRAIGHT FACE, BOTTOM RELIEF
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5330-00-165-935717547 INTERCHANGEABLE
Packing,preformed
Dana Automotive Systems Group, Llc Dba Dana Sealing Products
5950-00-725-6103240-0199-000 INTERCHANGEABLE
Coil,radio Frequency
Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems
5935-01-093-3875C1836-8 INTERCHANGEABLE
Plug,tip
Lockheed Martin Corporation Div Lockheed Martin Aeronautics Company
2995-01-164-040118257 INTERCHANGEABLE
Stem,valve
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
Cross-Reference Index
Part NumberManufacturer
18-257 PRIMARY Dresser Industries Inc Waukesha Engine Div (USA)
Related Parts
5330-00-165-9357INTERCHANGEABLE
PACKING,PREFORMED
17547
5950-00-725-6103INTERCHANGEABLE
COIL,RADIO FREQUENCY
240-0199-000
5935-01-093-3875INTERCHANGEABLE
PLUG,TIP
C1836-8
2995-01-164-0401INTERCHANGEABLE
STEM,VALVE
18257

Frequently Asked Questions

What is NSN 2805-00-528-6341?

NSN 2805-00-528-6341 is a Ring,piston, manufactured by Dresser Industries Inc Waukesha Engine Div, classified under FSC 2805 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 2805-00-528-6341?

NSN 2805-00-528-6341 has 1 cross-referenced part number: 18-257 (Dresser Industries Inc Waukesha Engine Div).

What NSN replaces 2805-00-528-6341?

There are 4 known substitutes for 2805-00-528-6341: 5330-00-165-9357, 5950-00-725-6103, 5935-01-093-3875 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18-257?

Key specifications for 18-257: Material: IRON OVERALL; Joint Style: VERTICAL JOINT; Ring Style: CONCENTRIC; Standard Bore Diameter: 5.000 INCHES IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 2805-00-528-6341 still in active supply?

NSN 2805-00-528-6341 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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