PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

385957O-Ring

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5331-00-882-9090 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-882-9090 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-882-9090. Primary manufacturer part number: 385957.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.100 INCHES NOMINAL IN
  • Center Hole Diameter: 0.424 INCHES NOMINAL IN
  • Material: RUBBER FLUOROCARBON CLASS FPM
  • 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 Fluorocarbon Class Fpm construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-882-9090, 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5331-00-882-9090
Primary Part Number385957
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusCANCELLED
Cross-Sectional Height0.100 INCHES NOMINAL IN
Center Hole Diameter0.424 INCHES NOMINAL IN
MaterialRUBBER FLUOROCARBON CLASS FPM
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5331-00-166-1059AS3209-111 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
385957 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
MS9388-111 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5331-00-166-1059INTERCHANGEABLE
O-RING
AS3209-111

Frequently Asked Questions

What is NSN 5331-00-882-9090?

NSN 5331-00-882-9090 is a O-Ring, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-882-9090?

NSN 5331-00-882-9090 has 2 cross-referenced part numbers: 385957 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), MS9388-111 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5331-00-882-9090?

There is 1 known substitute for 5331-00-882-9090: 5331-00-166-1059. Verify interchangeability with system specifications before substitution.

What are the specifications of 385957?

Key specifications for 385957: Cross-Sectional Height: 0.100 INCHES NOMINAL IN; Center Hole Diameter: 0.424 INCHES NOMINAL IN; Material: RUBBER FLUOROCARBON CLASS FPM. 3 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5331-00-882-9090 still in active supply?

NSN 5331-00-882-9090 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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