PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

217L12PC26O-Ring

Computer Machining Technology Corp · NSN 5331-00-964-7291 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-00-964-7291 — this item is cataloged by the U.S. Government under National Stock Number 5331-00-964-7291. Primary manufacturer part number: 217L12PC26.
Features
  • O-Ring — FSC 5331
  • Cross-Sectional Height: 0.125 INCHES NOMINAL IN
  • Material: RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR
  • 3 verified cross-references
  • Primary manufacturer: Computer Machining Technology Corp
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Isobutylene-Isoprene Class Iir construction
General Description

The O-Ring, cataloged under National Stock Number 5331-00-964-7291, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Computer Machining Technology Corp. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5331-00-964-7291
Primary Part Number217L12PC26
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerComputer Machining Technology Corp
StatusACTIVE
Cross-Sectional Height0.125 INCHES NOMINAL IN
MaterialRUBBER ISOBUTYLENE-ISOPRENE CLASS IIR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
5330-00-165-1848 INTERCHANGEABLE
Gasket
5310-00-254-1660 INTERCHANGEABLE
Washer,flat
5310-00-291-2753734913-27 INTERCHANGEABLE
Washer,flat
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5330-00-297-7355MIL-R-3065E INTERCHANGEABLE
Gasket
American Society for Testing and Materials Dba Astm International
5331-00-580-12172H3933 INTERCHANGEABLE
O-Ring
Caterpillar Inc Div Caterpillar Defense
5330-00-580-2011 INTERCHANGEABLE
Gasket
5310-00-599-5706 INTERCHANGEABLE
Washer,flat
9320-00-641-3391 INTERCHANGEABLE
Rubber Sheet,solid
5330-00-846-4339334C251H01 INTERCHANGEABLE
Gasket
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp
5331-00-912-26628624710-3 INTERCHANGEABLE
O-Ring
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
Cross-Reference Index
Part NumberManufacturer
217L12PC26 Computer Machining Technology Corp (USA)
MIL-R-3065E Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
76NC243 Computer Machining Technology Corp (USA)
Related Parts
5330-00-165-1848INTERCHANGEABLE
GASKET
5310-00-254-1660INTERCHANGEABLE
WASHER,FLAT
5310-00-291-2753INTERCHANGEABLE
WASHER,FLAT
734913-27
5330-00-297-7355INTERCHANGEABLE
GASKET
MIL-R-3065E
5331-00-580-1217INTERCHANGEABLE
O-RING
2H3933
5330-00-580-2011INTERCHANGEABLE
GASKET
5310-00-599-5706INTERCHANGEABLE
WASHER,FLAT
9320-00-641-3391INTERCHANGEABLE
RUBBER SHEET,SOLID
5330-00-846-4339INTERCHANGEABLE
GASKET
334C251H01
5331-00-912-2662INTERCHANGEABLE
O-RING
8624710-3
5330-00-919-7264INTERCHANGEABLE
SEAL,NONMETALLIC SPECIAL SHAPED
11588725

Frequently Asked Questions

What is NSN 5331-00-964-7291?

NSN 5331-00-964-7291 is a O-Ring, manufactured by Computer Machining Technology Corp, classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-00-964-7291?

NSN 5331-00-964-7291 has 3 cross-referenced part numbers: 217L12PC26 (Computer Machining Technology Corp), MIL-R-3065E (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 76NC243 (Computer Machining Technology Corp).

What NSN replaces 5331-00-964-7291?

There are 11 known substitutes for 5331-00-964-7291: 5330-00-165-1848, 5310-00-254-1660, 5310-00-291-2753 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 217L12PC26?

Key specifications for 217L12PC26: Cross-Sectional Height: 0.125 INCHES NOMINAL IN; Material: RUBBER ISOBUTYLENE-ISOPRENE CLASS IIR. 2 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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