PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50208Seal,plain Encased

National Seal Corp · NSN 5330-00-178-3100 · FSC 5330 · No Item Name Available
Verified by PartsTable
NSN 5330-00-178-3100 — this item is cataloged by the U.S. Government under National Stock Number 5330-00-178-3100. Primary manufacturer part number: 50208.
Features
  • Seal,plain Encased — FSC 5330
  • Case Style: SQUARE
  • Accommodated Shaft Maximum Rated Speed: 2000 FEET PER MINUTE FT
  • Material: LEATHER SEALING ELEMENT
  • Outside Diameter: 1.503 INCHES NOMINAL IN
  • Sealing Element Style: ANGULAR
  • Material: STEEL CASE
  • Housing Bore Diameter: 1.499 INCHES NOMINAL IN
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Leather Sealing Element construction
General Description

The Seal,plain Encased, cataloged under National Stock Number 5330-00-178-3100, is classified within Federal Supply Class 5330 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is National Seal Corp. Government technical data includes 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 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
NSN5330-00-178-3100
Primary Part Number50208
Item NameSeal,plain Encased
FSC / FSG5330 / 53 — No Item Name Available
ManufacturerNational Seal Corp
StatusACTIVE
Case StyleSQUARE
Accommodated Shaft Maximum Rated Speed2000 FEET PER MINUTE FT
MaterialLEATHER SEALING ELEMENT
Outside Diameter1.503 INCHES NOMINAL IN
Sealing Element StyleANGULAR
MaterialSTEEL CASE
Housing Bore Diameter1.499 INCHES NOMINAL IN
Accommodated Shaft Diameter0.969 INCHES NOMINAL IN
Seal Width0.391 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5315-00-017-7923 INTERCHANGEABLE
Pin,cotter
5325-00-052-36219307 INTERCHANGEABLE
Grommet,nonmetallic
Northrop Grumman Systems Corporation
6610-00-070-001221153 INTERCHANGEABLE
Shaft Assembly,rock
Aerosonic Llc
3110-00-100-6147MS19059-2408 INTERCHANGEABLE
Ball,bearing
American Society for Testing and Materials Dba Astm International
2805-00-113-5575NW15031 INTERCHANGEABLE
Sleeve,turn Knob
Tld Wollard Llc
5962-00-172-5586SN74153N INTERCHANGEABLE
Microcircuit,digital
Texas Instruments Incorporated
5133-00-189-9276 INTERCHANGEABLE
Drill,twist
5315-00-343-703759063 INTERCHANGEABLE
Pin,squeeze Grip Locking
Harold D Hard Co
5315-00-392-7759SM-B-148434 INTERCHANGEABLE
Pin,eccentric
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
3120-00-404-714915031 INTERCHANGEABLE
Bushing
Viz Manufacturing Company
Cross-Reference Index
Part NumberManufacturer
50208 National Seal Corp
PB426 Lauson Division of Tecumseh Products Co (USA)
50208 Federal-Mogul Corp Chassis Products Div (USA)
50208 Lauson Division of Tecumseh Products Co (USA)
00044 Defense Logistics Agency Dba Defense Supply Center Philadelphia (USA)
21153 Lauson Division of Tecumseh Products Co (USA)
15031 Skf Usa Inc. Dba Skf Aerospace Sealing Solutions (USA)
9613 Skf Usa Inc. Dba Skf Aerospace Sealing Solutions (USA)
Related Parts
5315-00-017-7923INTERCHANGEABLE
PIN,COTTER
5325-00-052-3621INTERCHANGEABLE
GROMMET,NONMETALLIC
9307
6610-00-070-0012INTERCHANGEABLE
SHAFT ASSEMBLY,ROCK
21153
3110-00-100-6147INTERCHANGEABLE
BALL,BEARING
MS19059-2408
2805-00-113-5575INTERCHANGEABLE
SLEEVE,TURN KNOB
NW15031
5962-00-172-5586INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
SN74153N
5133-00-189-9276INTERCHANGEABLE
DRILL,TWIST
5315-00-343-7037INTERCHANGEABLE
PIN,SQUEEZE GRIP LOCKING
59063
5315-00-392-7759INTERCHANGEABLE
PIN,ECCENTRIC
SM-B-148434
3120-00-404-7149INTERCHANGEABLE
BUSHING
15031
5365-00-438-3903INTERCHANGEABLE
SPACER,CHECK VALVE
15031
5315-00-448-6441INTERCHANGEABLE
PIN,HOLLOW

Frequently Asked Questions

What is NSN 5330-00-178-3100?

NSN 5330-00-178-3100 is a Seal,plain Encased, manufactured by National Seal Corp, classified under FSC 5330 (No Item Name Available). Status: active.

What are the part numbers for NSN 5330-00-178-3100?

NSN 5330-00-178-3100 has 8 cross-referenced part numbers: 50208 (National Seal Corp), PB426 (Lauson Division of Tecumseh Products Co), 50208 (Federal-Mogul Corp Chassis Products Div), 50208 (Lauson Division of Tecumseh Products Co), 00044 (Defense Logistics Agency Dba Defense Supply Center Philadelphia) and 3 more.

What NSN replaces 5330-00-178-3100?

There are 12 known substitutes for 5330-00-178-3100: 5315-00-017-7923, 5325-00-052-3621, 6610-00-070-0012 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 50208?

Key specifications for 50208: Case Style: SQUARE; Accommodated Shaft Maximum Rated Speed: 2000 FEET PER MINUTE FT; Material: LEATHER SEALING ELEMENT; Outside Diameter: 1.503 INCHES NOMINAL IN. 9 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