PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2H3918Seal,plain Encased

Caterpillar Inc Div Caterpillar Defense · NSN 5330-00-171-3921 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-171-3921 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-171-3921. Primary manufacturer part number: 2H3918.
Features
  • Seal,plain Encased — FSC 5330
  • 4 verified cross-references
  • Primary manufacturer: Caterpillar Inc Div Caterpillar Defense
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-171-3921, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Catalog Facts
Item NameSeal,plain Encased
FSC / FSG5330 — No Item Name Available (FSG 53)
ManufacturersCaterpillar Inc Div Caterpillar Defense (CAGE 11083); Federal-Mogul Corp Chassis Products Div (CAGE 76680); Defense Logistics Agency Dba Defense Supply Center Philadelphia (CAGE 14153); Federal-Mogul Corp Government Sales Dept (CAGE 01212)
Technical Specifications
ParameterValue
NSN5330-00-171-3921
Primary Part Number2H3918
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
5935-00-258-99107966 INTERCHANGEABLE
Socket,plug-in Electronic Compon
Eby Group, Llc, the Dba Eby Company Div Eby Company
2805-00-354-770255380 INTERCHANGEABLE
Head,cylinder
H20 Tank Inc U S Motors Div
4320-00-799-889855380 INTERCHANGEABLE
Pump Assembly,rotar
Hydro-Aire Aerospace Corp
5985-01-104-4301 INTERCHANGEABLE
Diplexer
5310-01-123-048855380 INTERCHANGEABLE
Nut,plain,hexagon
Sabre Engines Ltd
5340-01-676-503155-380 INTERCHANGEABLE
Bracket,angle
Edmund Optics, Inc
Cross-Reference Index
Part NumberManufacturer
2H3918 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
55380 Federal-Mogul Corp Chassis Products Div (USA)
00044 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
456472K69 Federal-Mogul Corp Government Sales Dept (USA)
Related Parts
5935-00-258-9910INTERCHANGEABLE
SOCKET,PLUG-IN ELECTRONIC COMPON
7966
2805-00-354-7702INTERCHANGEABLE
HEAD,CYLINDER
55380
4320-00-799-8898INTERCHANGEABLE
PUMP ASSEMBLY,ROTAR
55380
5985-01-104-4301INTERCHANGEABLE
DIPLEXER
5310-01-123-0488INTERCHANGEABLE
NUT,PLAIN,HEXAGON
55380
5340-01-676-5031INTERCHANGEABLE
BRACKET,ANGLE
55-380

Frequently Asked Questions

What is NSN 5330-00-171-3921?

NSN 5330-00-171-3921 is a Seal,plain Encased, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 5330 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5330-00-171-3921?

NSN 5330-00-171-3921 has 4 cross-referenced part numbers: 2H3918 (Caterpillar Inc Div Caterpillar Defense), 55380 (Federal-Mogul Corp Chassis Products Div), 00044 (Defense Logistics Agency Dba Defense Supply Center Philadelphia), 456472K69 (Federal-Mogul Corp Government Sales Dept).

What NSN replaces 5330-00-171-3921?

There are 6 known substitutes for 5330-00-171-3921: 5935-00-258-9910, 2805-00-354-7702, 4320-00-799-8898 and 3 more. Verify interchangeability with system specifications before substitution.

Is NSN 5330-00-171-3921 still in active supply?

NSN 5330-00-171-3921 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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