PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

503345O-Ring

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5331-00-050-0174 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-050-0174 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-050-0174. Primary manufacturer part number: 503345.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
  • Center Hole Diameter: 3.071 INCHES MINIMUM AND 3.091 INCHES MAXIMUM IN
  • 2 verified cross-references
  • Primary manufacturer: Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Butadiene-Acrylonitrile Class Nbr construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-050-0174, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 3 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. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-00-050-0174
Primary Part Number503345
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusACTIVE
Cross-Sectional Height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
Center Hole Diameter3.071 INCHES MINIMUM AND 3.091 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5310-00-050-3345 INTERCHANGEABLE
Nut,self-Locking,hexagon
5330-00-425-2474 INTERCHANGEABLE
Gasket
Cross-Reference Index
Part NumberManufacturer
503345 Lord Corporation Dba Lord Corp (USA)
503345 PRIMARY Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
5310-00-050-3345INTERCHANGEABLE
NUT,SELF-LOCKING,HEXAGON
5330-00-425-2474INTERCHANGEABLE
GASKET

Frequently Asked Questions

What is NSN 5331-00-050-0174?

NSN 5331-00-050-0174 is a O-Ring, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-050-0174?

NSN 5331-00-050-0174 has 2 cross-referenced part numbers: 503345 (Lord Corporation Dba Lord Corp), 503345 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).

What NSN replaces 5331-00-050-0174?

There are 2 known substitutes for 5331-00-050-0174: 5310-00-050-3345, 5330-00-425-2474. Verify interchangeability with system specifications before substitution.

What are the specifications of 503345?

Key specifications for 503345: Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR; Center Hole Diameter: 3.071 INCHES MINIMUM AND 3.091 INCHES MAXIMUM IN. 3 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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