PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

91338Ring,piston

Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. · NSN 2810-00-536-1997 · FSC 2810 · No Item Name Available
Verified by PartsTable
NSN 2810-00-536-1997 — this item is cataloged by the U.S. Government under National Stock Number 2810-00-536-1997. Primary manufacturer part number: 91338.
Features
  • Ring,piston — FSC 2810
  • Material Document and Classification: AMS 7310 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • Radial Wall Thickness: 0.2150 INCHES MINIMUM AND 0.2250 INCHES MAXIMUM IN
  • FSC Application Data: ACFT ENG,RECIPROCATING
  • Joint Style: VERTICAL JOINT
  • Standard Bore Diameter: 5.284 INCHES IN
  • Material: STEEL OVERALL
  • Ring Style: CONCENTRIC
Applications
  • Applications requiring Steel Overall construction
General Description

The Ring,piston, cataloged under National Stock Number 2810-00-536-1997, is classified within Federal Supply Class 2810 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2810-00-536-1997
Primary Part Number91338
Item NameRing,piston
FSC / FSG2810 / 28 — No Item Name Available
ManufacturerPratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
StatusACTIVE
Material Document and ClassificationAMS 7310 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Radial Wall Thickness0.2150 INCHES MINIMUM AND 0.2250 INCHES MAXIMUM IN
FSC Application DataACFT ENG,RECIPROCATING
Joint StyleVERTICAL JOINT
Standard Bore Diameter5.284 INCHES IN
MaterialSTEEL OVERALL
Ring StyleCONCENTRIC
Cross-Sectional Shape StyleINSIDE COUNTERBORE, KEYSTONE, STRAIGHT FACE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5940-00-143-4793MS25036-110 INTERCHANGEABLE
Terminal,lug
Sae International Dba Sae International
5985-00-310-4212802027393001-15 INTERCHANGEABLE
Attenuator,fixed
Navy, United States Department of the Dba Naval Surface Warfare Center Div Naval Surface Warfare Center Crane Division
6850-01-154-365591338 INTERCHANGEABLE
Teststick Kit
Ctl Scientific Supply Corp. Dba Ctl Scientific Supply Corp
Cross-Reference Index
Part NumberManufacturer
91338 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
91338 PRIMARY Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp. (CAN)
Related Parts
5940-00-143-4793INTERCHANGEABLE
TERMINAL,LUG
MS25036-110
5985-00-310-4212INTERCHANGEABLE
ATTENUATOR,FIXED
802027393001-15
6850-01-154-3655INTERCHANGEABLE
TESTSTICK KIT
91338

Frequently Asked Questions

What is NSN 2810-00-536-1997?

NSN 2810-00-536-1997 is a Ring,piston, manufactured by Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp., classified under FSC 2810 (No Item Name Available). Status: active.

What are the part numbers for NSN 2810-00-536-1997?

NSN 2810-00-536-1997 has 2 cross-referenced part numbers: 91338 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 91338 (Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.).

What NSN replaces 2810-00-536-1997?

There are 3 known substitutes for 2810-00-536-1997: 5940-00-143-4793, 5985-00-310-4212, 6850-01-154-3655. Verify interchangeability with system specifications before substitution.

What are the specifications of 91338?

Key specifications for 91338: Material Document and Classification: AMS 7310 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Radial Wall Thickness: 0.2150 INCHES MINIMUM AND 0.2250 INCHES MAXIMUM IN; FSC Application Data: ACFT ENG,RECIPROCATING; Overall Width: 0.1075 INCHES MINIMUM AND 0.1085 INCHES MAXIMUM IN. 9 total characteristics are documented in the Federal Logistics Information System.

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