PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2178Seal,plain Encased

Lidgerwood Manufacturing Company Dba Lidgerwood Manufacturing Co Div Lidgerwood Manufacuring Co · NSN 5330-00-171-3925 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-171-3925 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-171-3925. Primary manufacturer part number: 2178.
Features
  • Seal,plain Encased — FSC 5330
  • Seal Width: 0.438 INCHES NOMINAL IN
  • Accommodated Shaft Diameter: 1.750 INCHES NOMINAL IN
  • Sealing Element Style: ANGULAR
  • Case Style: SQUARE
  • Material: STEEL CASE
  • Housing Bore Diameter: 2.750 INCHES NOMINAL IN
  • Accommodated Shaft Maximum Rated Speed: 2000 FEET PER MINUTE FT
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Steel Case construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-171-3925, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Lidgerwood Manufacturing Company Dba Lidgerwood Manufacturing Co Div Lidgerwood Manufacuring Co. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5330-00-171-3925
Primary Part Number2178
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerLidgerwood Manufacturing Company Dba Lidgerwood Manufacturing Co Div Lidgerwood Manufacuring Co
StatusACTIVE
Seal Width0.438 INCHES NOMINAL IN
Accommodated Shaft Diameter1.750 INCHES NOMINAL IN
Sealing Element StyleANGULAR
Case StyleSQUARE
MaterialSTEEL CASE
Housing Bore Diameter2.750 INCHES NOMINAL IN
Accommodated Shaft Maximum Rated Speed2000 FEET PER MINUTE FT
MaterialRUBBER SYNTHETIC SEALING ELEMENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
9540-00-145-8169 INTERCHANGEABLE
Angle,structural
5950-00-147-147621-78 INTERCHANGEABLE
Reactor
Bae Systems Information and Electronic Systems Integration Inc.
6145-00-155-5262 INTERCHANGEABLE
Braid,wire
2815-00-364-35323291981 INTERCHANGEABLE
Housing,throttle Co
Rolls-Royce Solutions America Inc
9540-00-580-0987 INTERCHANGEABLE
Angle,structural
5950-00-645-7431 INTERCHANGEABLE
Coil,radio Frequency
9540-00-720-0674 INTERCHANGEABLE
Angle,structural
5945-00-911-8078 INTERCHANGEABLE
Relay,electromagnetic
4730-00-967-44762178 INTERCHANGEABLE
Bimetal Element Assembly
Velan Valve Corp.
6350-01-252-62902178 INTERCHANGEABLE
Horn,signal
Windham Lifts Inc
Cross-Reference Index
Part NumberManufacturer
00044 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
2178 PRIMARY Lidgerwood Manufacturing Company Dba Lidgerwood Manufacturing Co Div Lidgerwood Manufacuring Co (USA)
2178 PRIMARY Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc (USA)
Related Parts
9540-00-145-8169INTERCHANGEABLE
ANGLE,STRUCTURAL
5950-00-147-1476INTERCHANGEABLE
REACTOR
21-78
6145-00-155-5262INTERCHANGEABLE
BRAID,WIRE
2815-00-364-3532INTERCHANGEABLE
HOUSING,THROTTLE CO
3291981
9540-00-580-0987INTERCHANGEABLE
ANGLE,STRUCTURAL
5950-00-645-7431INTERCHANGEABLE
COIL,RADIO FREQUENCY
9540-00-720-0674INTERCHANGEABLE
ANGLE,STRUCTURAL
5945-00-911-8078INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
4730-00-967-4476INTERCHANGEABLE
BIMETAL ELEMENT ASSEMBLY
2178
6350-01-252-6290INTERCHANGEABLE
HORN,SIGNAL
2178
5998-01-255-7607INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
1328AS736
6515-01-262-2310INTERCHANGEABLE
BAG,OSTOMY
2178

Frequently Asked Questions

What is NSN 5330-00-171-3925?

NSN 5330-00-171-3925 is a Seal,plain Encased, manufactured by Lidgerwood Manufacturing Company Dba Lidgerwood Manufacturing Co Div Lidgerwood Manufacuring Co, classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-00-171-3925?

NSN 5330-00-171-3925 has 3 cross-referenced part numbers: 00044 (Defense Logistics Agency Dba Defense Supply Center Philadelphia), 2178 (Lidgerwood Manufacturing Company Dba Lidgerwood Manufacturing Co Div Lidgerwood Manufacuring Co), 2178 (Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc).

What NSN replaces 5330-00-171-3925?

There are 12 known substitutes for 5330-00-171-3925: 9540-00-145-8169, 5950-00-147-1476, 6145-00-155-5262 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2178?

Key specifications for 2178: Seal Width: 0.438 INCHES NOMINAL IN; Accommodated Shaft Diameter: 1.750 INCHES NOMINAL IN; Sealing Element Style: ANGULAR; Case Style: SQUARE. 8 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com