PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

99-6O-Ring

Hamilton Sundstrand Corporation · NSN 5331-00-359-4550 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-359-4550 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-359-4550. Primary manufacturer part number: 99-6.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.094 INCHES NOMINAL IN
  • Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
  • 4 verified cross-references
  • Primary manufacturer: Hamilton Sundstrand Corporation
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 5331-00-359-4550, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Hamilton Sundstrand Corporation. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5331-00-359-4550
Primary Part Number99-6
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerHamilton Sundstrand Corporation
StatusCANCELLED
Cross-Sectional Height0.094 INCHES NOMINAL IN
MaterialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5940-00-050-2308 INTERCHANGEABLE
Terminal,lug
5999-00-077-2793 INTERCHANGEABLE
Contact Assembly,electrical
5975-00-079-8057996 INTERCHANGEABLE
Bushing,electrical Conduit
M&w Electric Manufacturing Co. Llc
5120-00-152-2298 INTERCHANGEABLE
Blade,nutdriver
2240-00-179-036626019 INTERCHANGEABLE
Wedge,railway Journal Bearing
Volvo Construction Equipment North America, Llc
3445-00-223-8342 INTERCHANGEABLE
Punching and Shearing Machine,me
1730-00-391-7935996-010 INTERCHANGEABLE
Jack,hydraulic,tripod
Columbus Jack Corporation Div Columbus Jack
5342-00-969-4409 INTERCHANGEABLE
Bumper,piston
5305-01-023-1901996 INTERCHANGEABLE
Screw,cap,hexagon Head
Leroi International Inc Dba Compair Leroi
5450-01-083-0438996 INTERCHANGEABLE
Bleacher,portable
Gill Harry Co
Cross-Reference Index
Part NumberManufacturer
99-6 Hamilton Sundstrand Corporation (USA)
A395X9 David Brown Hydraulics Inc Dba Hydreco (USA)
A395X9 Eaton Aerospace, Llc Dba Jackson South (USA)
A395X9 General Signal Corp (USA)
Related Parts
5940-00-050-2308INTERCHANGEABLE
TERMINAL,LUG
5999-00-077-2793INTERCHANGEABLE
CONTACT ASSEMBLY,ELECTRICAL
5975-00-079-8057INTERCHANGEABLE
BUSHING,ELECTRICAL CONDUIT
996
5120-00-152-2298INTERCHANGEABLE
BLADE,NUTDRIVER
2240-00-179-0366INTERCHANGEABLE
WEDGE,RAILWAY JOURNAL BEARING
26019
3445-00-223-8342INTERCHANGEABLE
PUNCHING AND SHEARING MACHINE,ME
1730-00-391-7935INTERCHANGEABLE
JACK,HYDRAULIC,TRIPOD
996-010
5342-00-969-4409INTERCHANGEABLE
BUMPER,PISTON
5305-01-023-1901INTERCHANGEABLE
SCREW,CAP,HEXAGON HEAD
996
5450-01-083-0438INTERCHANGEABLE
BLEACHER,PORTABLE
996
5970-01-105-5622INTERCHANGEABLE
INSULATING VARNISH,ELECTRICAL
5360-01-208-8659INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
996

Frequently Asked Questions

What is NSN 5331-00-359-4550?

NSN 5331-00-359-4550 is a O-Ring, manufactured by Hamilton Sundstrand Corporation, classified under FSC 5331 (O-Ring). Status: cancelled.

What are the part numbers for NSN 5331-00-359-4550?

NSN 5331-00-359-4550 has 4 cross-referenced part numbers: 99-6 (Hamilton Sundstrand Corporation), A395X9 (David Brown Hydraulics Inc Dba Hydreco), A395X9 (Eaton Aerospace, Llc Dba Jackson South), A395X9 (General Signal Corp).

What NSN replaces 5331-00-359-4550?

There are 12 known substitutes for 5331-00-359-4550: 5940-00-050-2308, 5999-00-077-2793, 5975-00-079-8057 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 99-6?

Key specifications for 99-6: Cross-Sectional Height: 0.094 INCHES NOMINAL IN; Material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR. 2 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5331-00-359-4550 still in active supply?

NSN 5331-00-359-4550 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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