PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

70721O-Ring

Defense Maritime Solutions, Inc. · NSN 5331-01-212-4626 · FSC 5331 · O-Ring
Verified by PartsTable
NSN 5331-01-212-4626 — this item is cataloged by the U.S. Government under National Stock Number 5331-01-212-4626. Primary manufacturer part number: 70721.
Features
  • O-Ring — FSC 5331
  • 3 verified cross-references
  • Primary manufacturer: Defense Maritime Solutions, Inc.
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The O-Ring, cataloged under National Stock Number 5331-01-212-4626, is classified within Federal Supply Class 5331 (O-Ring) of the Hardware and Abrasives group. The primary manufacturer of record is Defense Maritime Solutions, Inc.. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameO-Ring
FSC / FSG5331 — O-Ring (FSG 53)
ManufacturersWartsila Lips Inc (CAGE 0SYN4); Eaton Corporation Dba Eaton Inoac Div Eaton (CAGE 77842); Defense Maritime Solutions, Inc. (CAGE 0EYA6)
Technical Specifications
ParameterValue
NSN5331-01-212-4626
Primary Part Number70721
Item NameO-Ring
FSC / FSG5331 / 53 — O-Ring
ManufacturerDefense Maritime Solutions, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
2520-00-392-3583X117C INTERCHANGEABLE
Collar,clutch Shift
Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
5365-00-582-88412W1K40-26-32 INTERCHANGEABLE
Spacer,ring
The Boeing Company Div Legacy Am&m
5935-01-098-0661UG-1416/U INTERCHANGEABLE
Connector,plug,electrical
Joint Electronics Type Designation System
5930-01-178-897170789-07 INTERCHANGEABLE
Switch,push
Muirhead Aerospace Ltd
Cross-Reference Index
Part NumberManufacturer
70721 Wartsila Lips Inc (USA)
70721 Eaton Corporation Dba Eaton Inoac Div Eaton (USA)
70721 PRIMARY Defense Maritime Solutions, Inc. (USA)
Related Parts
2520-00-392-3583INTERCHANGEABLE
COLLAR,CLUTCH SHIFT
X117C
5365-00-582-8841INTERCHANGEABLE
SPACER,RING
2W1K40-26-32
5935-01-098-0661INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
UG-1416/U
5930-01-178-8971INTERCHANGEABLE
SWITCH,PUSH
70789-07

Frequently Asked Questions

What is NSN 5331-01-212-4626?

NSN 5331-01-212-4626 is a O-Ring, manufactured by Defense Maritime Solutions, Inc., classified under FSC 5331 (O-Ring). Status: active.

What are the part numbers for NSN 5331-01-212-4626?

NSN 5331-01-212-4626 has 3 cross-referenced part numbers: 70721 (Wartsila Lips Inc), 70721 (Eaton Corporation Dba Eaton Inoac Div Eaton), 70721 (Defense Maritime Solutions, Inc.).

What NSN replaces 5331-01-212-4626?

There are 4 known substitutes for 5331-01-212-4626: 2520-00-392-3583, 5365-00-582-8841, 5935-01-098-0661 and 1 more. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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