PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

385951O-Ring

Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney · NSN 5331-00-882-9118 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-882-9118 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-882-9118. Primary manufacturer part number: 385951.
Features
  • O-Ring — FSC 5331
  • Elongation Percentage: 125 MAXIMUM
  • Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
  • Material: RUBBER FLUOROCARBON CLASS FPM
  • Center Hole Diameter: 0.795 INCHES MINIMUM AND 0.807 INCHES MAXIMUM IN
  • Temp Rating: -20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
  • Hardness Rating: 75.0 SHORE DUROMETER A NOMINAL
  • Outside Diameter: 0.941 INCHES NOMINAL IN
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 5331-00-882-9118, 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 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 6 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
NSN5331-00-882-9118
Primary Part Number385951
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerRtx Corporation Dba Pratt & Whitney Div Pratt &whitney
StatusCANCELLED
Elongation Percentage125 MAXIMUM
Cross-Sectional Height0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN
MaterialRUBBER FLUOROCARBON CLASS FPM
Center Hole Diameter0.795 INCHES MINIMUM AND 0.807 INCHES MAXIMUM IN
Temp Rating-20.0 FAHRENHEIT AND 400.0 FAHRENHEIT DEGF
Hardness Rating75.0 SHORE DUROMETER A NOMINAL
Outside Diameter0.941 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
5331-00-166-0996 INTERCHANGEABLE
O-Ring
Cross-Reference Index
Part NumberManufacturer
385951 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
N7425068019 Airbus Helicopters (ets De Marignane) (FRA)
MS9388-019 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MS9388-019 Le Joint Francais (FRA)
6843333-019 Allison Transmission Inc Dba Allison Transmission, Inc (USA)
MS9388-019 Aero Stock (FRA)
Related Parts
5331-00-166-0996INTERCHANGEABLE
O-RING

Frequently Asked Questions

What is NSN 5331-00-882-9118?

NSN 5331-00-882-9118 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 5331-00-882-9118?

NSN 5331-00-882-9118 has 6 cross-referenced part numbers: 385951 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), N7425068019 (Airbus Helicopters (ets De Marignane)), MS9388-019 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MS9388-019 (Le Joint Francais), 6843333-019 (Allison Transmission Inc Dba Allison Transmission, Inc) and 1 more.

What NSN replaces 5331-00-882-9118?

There is 1 known substitute for 5331-00-882-9118: 5331-00-166-0996. Verify interchangeability with system specifications before substitution.

What are the specifications of 385951?

Key specifications for 385951: Elongation Percentage: 125 MAXIMUM; Cross-Sectional Height: 0.067 INCHES MINIMUM AND 0.073 INCHES MAXIMUM IN; Material: RUBBER FLUOROCARBON CLASS FPM; Center Hole Diameter: 0.795 INCHES MINIMUM AND 0.807 INCHES MAXIMUM IN. 7 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5331-00-882-9118 still in active supply?

NSN 5331-00-882-9118 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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